The remote RockyLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2026:5932 advisory.

    * firefox: thunderbird: Use-after-free in the JavaScript Engine component (CVE-2026-4701)

    * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird ESR     140.9, Firefox 149 and Thunderbird 149 (CVE-2026-4721)

    * firefox: thunderbird: Privilege escalation in the Netmonitor component (CVE-2026-4717)

    * firefox: thunderbird: Sandbox escape due to use-after-free in the Disability Access APIs component     (CVE-2026-4688)

    * firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4706)

    * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Web Codecs component     (CVE-2026-4695)

    * firefox: thunderbird: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM     component (CVE-2026-4689)

    * firefox: thunderbird: JIT miscompilation in the JavaScript Engine: JIT component (CVE-2026-4698)

    * firefox: thunderbird: Incorrect boundary conditions, uninitialized memory in the JavaScript Engine     component (CVE-2026-4716)

    * firefox: thunderbird: Race condition, use-after-free in the Graphics: WebRender component     (CVE-2026-4684)

    * firefox: thunderbird: Undefined behavior in the WebRTC: Signaling component (CVE-2026-4705)

    * firefox: thunderbird: Uninitialized memory in the Graphics: Canvas2D component (CVE-2026-4715)

    * firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4685)

    * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video component (CVE-2026-4714)

    * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: GMP component (CVE-2026-4709)

    * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video component (CVE-2026-4710)

    * firefox: thunderbird: Information disclosure in the Widget: Cocoa component (CVE-2026-4712)

    * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Web Codecs component     (CVE-2026-4697)

    * firefox: thunderbird: Incorrect boundary conditions in the Graphics component (CVE-2026-4713)

    * firefox: thunderbird: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM     component (CVE-2026-4690)

    * firefox: thunderbird: Use-after-free in the Widget: Cocoa component (CVE-2026-4711)

    * firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4686)

    * firefox: thunderbird: Incorrect boundary conditions in the Graphics component (CVE-2026-4708)

    * firefox: thunderbird: Use-after-free in the CSS Parsing and Computation component (CVE-2026-4691)

    * firefox: thunderbird: Incorrect boundary conditions in the Layout: Text and Fonts component     (CVE-2026-4699)

    * firefox: thunderbird: Use-after-free in the Layout: Text and Fonts component (CVE-2026-4696)

    * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Playback component     (CVE-2026-4693)

    * firefox: thunderbird: Undefined behavior in the WebRTC: Signaling component (CVE-2026-4718)

    * firefox: thunderbird: JIT miscompilation in the JavaScript Engine component (CVE-2026-4702)

    * firefox: thunderbird: Incorrect boundary conditions in the Graphics: Text component (CVE-2026-4719)

    * firefox: thunderbird: Incorrect boundary conditions, integer overflow in the Graphics component     (CVE-2026-4694)

    * firefox: thunderbird: Sandbox escape in the Responsive Design Mode component (CVE-2026-4692)

    * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149     and Thunderbird 149 (CVE-2026-4720)

    * firefox: thunderbird: Mitigation bypass in the Networking: HTTP component (CVE-2026-4700)

    * firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4707)

    * firefox: thunderbird: Denial-of-service in the WebRTC: Signaling component (CVE-2026-4704)

    * firefox: thunderbird: Sandbox escape due to incorrect boundary conditions in the Telemetry component     (CVE-2026-4687)

Tenable has extracted the preceding description block directly from the RockyLinux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote RockyLinux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2026:5931 advisory.

    * firefox: thunderbird: Use-after-free in the JavaScript Engine component (CVE-2026-4701)

    * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird ESR     140.9, Firefox 149 and Thunderbird 149 (CVE-2026-4721)

    * firefox: thunderbird: Privilege escalation in the Netmonitor component (CVE-2026-4717)

    * firefox: thunderbird: Sandbox escape due to use-after-free in the Disability Access APIs component     (CVE-2026-4688)

    * firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4706)

    * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Web Codecs component     (CVE-2026-4695)

    * firefox: thunderbird: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM     component (CVE-2026-4689)

    * firefox: thunderbird: JIT miscompilation in the JavaScript Engine: JIT component (CVE-2026-4698)

    * firefox: thunderbird: Incorrect boundary conditions, uninitialized memory in the JavaScript Engine     component (CVE-2026-4716)

    * firefox: thunderbird: Race condition, use-after-free in the Graphics: WebRender component     (CVE-2026-4684)

    * firefox: thunderbird: Undefined behavior in the WebRTC: Signaling component (CVE-2026-4705)

    * firefox: thunderbird: Uninitialized memory in the Graphics: Canvas2D component (CVE-2026-4715)

    * firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4685)

    * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video component (CVE-2026-4714)

    * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: GMP component (CVE-2026-4709)

    * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video component (CVE-2026-4710)

    * firefox: thunderbird: Information disclosure in the Widget: Cocoa component (CVE-2026-4712)

    * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Web Codecs component     (CVE-2026-4697)

    * firefox: thunderbird: Incorrect boundary conditions in the Graphics component (CVE-2026-4713)

    * firefox: thunderbird: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM     component (CVE-2026-4690)

    * firefox: thunderbird: Use-after-free in the Widget: Cocoa component (CVE-2026-4711)

    * firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4686)

    * firefox: thunderbird: Incorrect boundary conditions in the Graphics component (CVE-2026-4708)

    * firefox: thunderbird: Use-after-free in the CSS Parsing and Computation component (CVE-2026-4691)

    * firefox: thunderbird: Incorrect boundary conditions in the Layout: Text and Fonts component     (CVE-2026-4699)

    * firefox: thunderbird: Use-after-free in the Layout: Text and Fonts component (CVE-2026-4696)

    * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Playback component     (CVE-2026-4693)

    * firefox: thunderbird: Undefined behavior in the WebRTC: Signaling component (CVE-2026-4718)

    * firefox: thunderbird: JIT miscompilation in the JavaScript Engine component (CVE-2026-4702)

    * firefox: thunderbird: Incorrect boundary conditions in the Graphics: Text component (CVE-2026-4719)

    * firefox: thunderbird: Incorrect boundary conditions, integer overflow in the Graphics component     (CVE-2026-4694)

    * firefox: thunderbird: Sandbox escape in the Responsive Design Mode component (CVE-2026-4692)

    * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149     and Thunderbird 149 (CVE-2026-4720)

    * firefox: thunderbird: Mitigation bypass in the Networking: HTTP component (CVE-2026-4700)

    * firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4707)

    * firefox: thunderbird: Denial-of-service in the WebRTC: Signaling component (CVE-2026-4704)

    * firefox: thunderbird: Sandbox escape due to incorrect boundary conditions in the Telemetry component     (CVE-2026-4687)

Tenable has extracted the preceding description block directly from the RockyLinux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 8 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2026:7842 advisory.

    Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and     portability.

    Security Fix(es):

    * firefox: thunderbird: Use-after-free in the JavaScript Engine component (CVE-2026-4701)

    * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird ESR     140.9, Firefox 149 and Thunderbird 149 (CVE-2026-4721)

    * firefox: thunderbird: Privilege escalation in the Netmonitor component (CVE-2026-4717)

    * firefox: thunderbird: Sandbox escape due to use-after-free in the Disability Access APIs component     (CVE-2026-4688)

    * firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4706)

    * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Web Codecs component     (CVE-2026-4695)

    * firefox: thunderbird: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM     component (CVE-2026-4689)

    * firefox: thunderbird: JIT miscompilation in the JavaScript Engine: JIT component (CVE-2026-4698)

    * firefox: thunderbird: Incorrect boundary conditions, uninitialized memory in the JavaScript Engine     component (CVE-2026-4716)

    * firefox: thunderbird: Race condition, use-after-free in the Graphics: WebRender component     (CVE-2026-4684)

    * firefox: thunderbird: Undefined behavior in the WebRTC: Signaling component (CVE-2026-4705)

    * firefox: thunderbird: Uninitialized memory in the Graphics: Canvas2D component (CVE-2026-4715)

    * firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4685)

    * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video component (CVE-2026-4714)

    * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: GMP component (CVE-2026-4709)

    * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video component (CVE-2026-4710)

    * firefox: thunderbird: Information disclosure in the Widget: Cocoa component (CVE-2026-4712)

    * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Web Codecs component     (CVE-2026-4697)

    * firefox: thunderbird: Incorrect boundary conditions in the Graphics component (CVE-2026-4713)

    * firefox: thunderbird: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM     component (CVE-2026-4690)

    * firefox: thunderbird: Use-after-free in the Widget: Cocoa component (CVE-2026-4711)

    * firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4686)

    * firefox: thunderbird: Incorrect boundary conditions in the Graphics component (CVE-2026-4708)

    * firefox: thunderbird: Use-after-free in the CSS Parsing and Computation component (CVE-2026-4691)

    * firefox: thunderbird: Incorrect boundary conditions in the Layout: Text and Fonts component     (CVE-2026-4699)

    * firefox: thunderbird: Use-after-free in the Layout: Text and Fonts component (CVE-2026-4696)

    * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Playback component     (CVE-2026-4693)

    * firefox: thunderbird: Undefined behavior in the WebRTC: Signaling component (CVE-2026-4718)

    * firefox: thunderbird: JIT miscompilation in the JavaScript Engine component (CVE-2026-4702)

    * firefox: thunderbird: Incorrect boundary conditions in the Graphics: Text component (CVE-2026-4719)

    * firefox: thunderbird: Incorrect boundary conditions, integer overflow in the Graphics component     (CVE-2026-4694)

    * firefox: thunderbird: Sandbox escape in the Responsive Design Mode component (CVE-2026-4692)

    * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149     and Thunderbird 149 (CVE-2026-4720)

    * firefox: thunderbird: Mitigation bypass in the Networking: HTTP component (CVE-2026-4700)

    * firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4707)

    * firefox: thunderbird: Denial-of-service in the WebRTC: Signaling component (CVE-2026-4704)

    * firefox: thunderbird: Sandbox escape due to incorrect boundary conditions in the Telemetry component     (CVE-2026-4687)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 8 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2026:7838 advisory.

    Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and     portability.

    Security Fix(es):

    * firefox: thunderbird: Use-after-free in the JavaScript Engine component (CVE-2026-4701)

    * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird ESR     140.9, Firefox 149 and Thunderbird 149 (CVE-2026-4721)

    * firefox: thunderbird: Privilege escalation in the Netmonitor component (CVE-2026-4717)

    * firefox: thunderbird: Sandbox escape due to use-after-free in the Disability Access APIs component     (CVE-2026-4688)

    * firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4706)

    * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Web Codecs component     (CVE-2026-4695)

    * firefox: thunderbird: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM     component (CVE-2026-4689)

    * firefox: thunderbird: JIT miscompilation in the JavaScript Engine: JIT component (CVE-2026-4698)

    * firefox: thunderbird: Incorrect boundary conditions, uninitialized memory in the JavaScript Engine     component (CVE-2026-4716)

    * firefox: thunderbird: Race condition, use-after-free in the Graphics: WebRender component     (CVE-2026-4684)

    * firefox: thunderbird: Undefined behavior in the WebRTC: Signaling component (CVE-2026-4705)

    * firefox: thunderbird: Uninitialized memory in the Graphics: Canvas2D component (CVE-2026-4715)

    * firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4685)

    * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video component (CVE-2026-4714)

    * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: GMP component (CVE-2026-4709)

    * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video component (CVE-2026-4710)

    * firefox: thunderbird: Information disclosure in the Widget: Cocoa component (CVE-2026-4712)

    * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Web Codecs component     (CVE-2026-4697)

    * firefox: thunderbird: Incorrect boundary conditions in the Graphics component (CVE-2026-4713)

    * firefox: thunderbird: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM     component (CVE-2026-4690)

    * firefox: thunderbird: Use-after-free in the Widget: Cocoa component (CVE-2026-4711)

    * firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4686)

    * firefox: thunderbird: Incorrect boundary conditions in the Graphics component (CVE-2026-4708)

    * firefox: thunderbird: Use-after-free in the CSS Parsing and Computation component (CVE-2026-4691)

    * firefox: thunderbird: Incorrect boundary conditions in the Layout: Text and Fonts component     (CVE-2026-4699)

    * firefox: thunderbird: Use-after-free in the Layout: Text and Fonts component (CVE-2026-4696)

    * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Playback component     (CVE-2026-4693)

    * firefox: thunderbird: Undefined behavior in the WebRTC: Signaling component (CVE-2026-4718)

    * firefox: thunderbird: JIT miscompilation in the JavaScript Engine component (CVE-2026-4702)

    * firefox: thunderbird: Incorrect boundary conditions in the Graphics: Text component (CVE-2026-4719)

    * firefox: thunderbird: Incorrect boundary conditions, integer overflow in the Graphics component     (CVE-2026-4694)

    * firefox: thunderbird: Sandbox escape in the Responsive Design Mode component (CVE-2026-4692)

    * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149     and Thunderbird 149 (CVE-2026-4720)

    * firefox: thunderbird: Mitigation bypass in the Networking: HTTP component (CVE-2026-4700)

    * firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4707)

    * firefox: thunderbird: Denial-of-service in the WebRTC: Signaling component (CVE-2026-4704)

    * firefox: thunderbird: Sandbox escape due to incorrect boundary conditions in the Telemetry component     (CVE-2026-4687)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-1554 advisory.

    LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable     Network Graphics) raster image files. In versions 1.2.1 through 1.6.55, `png_set_tRNS` and `png_set_PLTE`     each alias a heap-allocated buffer between `png_struct` and `png_info`, sharing a single allocation across     two structs with independent lifetimes. The `trans_alpha` aliasing has been present since at least libpng     1.0, and the `palette` aliasing since at least 1.2.1. Both affect all prior release lines `png_set_tRNS`     sets `png_ptr->trans_alpha = info_ptr->trans_alpha` (256-byte buffer) and `png_set_PLTE` sets     `info_ptr->palette = png_ptr->palette` (768-byte buffer). In both cases, calling `png_free_data` (with     `PNG_FREE_TRNS` or `PNG_FREE_PLTE`) frees the buffer through `info_ptr` while the corresponding `png_ptr`     pointer remains dangling. Subsequent row-transform functions dereference and, in some code paths, write to     the freed memory. A second call to `png_set_tRNS` or `png_set_PLTE` has the same effect, because both     functions call `png_free_data` internally before reallocating the `info_ptr` buffer. Version 1.6.56 fixes     the issue.

    NOTE: https://github.com/pnggroup/libpng/security/advisories/GHSA-m4pc-p4q3-4c7jNOTE:
    https://github.com/pnggroup/libpng/pull/824NOTE: Fixed by:
    https://github.com/pnggroup/libpng/commit/23019269764e35ed8458e517f1897bd3c54820eb (v1.6.56)NOTE: Fixed     by: https://github.com/pnggroup/libpng/commit/a3a21443ed12bfa1ef46fa0d4fb2b74a0fa34a25 (v1.6.56)NOTE:
    Fixed by: https://github.com/pnggroup/libpng/commit/7ea9eea884a2328cc7fdcb3c0c00246a50d90667     (v1.6.56)NOTE: Fixed by:
    https://github.com/pnggroup/libpng/commit/c1b0318b393c90679e6fa5bc1d329fd5d5012ec1 (v1.6.56)     (CVE-2026-33416)

    LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable     Network Graphics) raster image files. In versions 1.6.36 through 1.6.55, an out-of-bounds read and write     exists in libpng's ARM/AArch64 Neon-optimized palette expansion path. When expanding 8-bit paletted rows     to RGB or RGBA, the Neon loop processes a final partial chunk without verifying that enough input pixels     remain. Because the implementation works backward from the end of the row, the final iteration     dereferences pointers before the start of the row buffer (OOB read) and writes expanded pixel data to the     same underflowed positions (OOB write). This is reachable via normal decoding of attacker-controlled PNG     input if Neon is enabled. Version 1.6.56 fixes the issue.

    NOTE: https://github.com/pnggroup/libpng/security/advisories/GHSA-wjr5-c57x-95m2NOTE: Introduced with:
    https://github.com/pnggroup/libpng/commit/7734cda20cf1236aef60f3bbd2267c97bbb40869 (v1.6.36)NOTE: Fixed     by: https://github.com/pnggroup/libpng/commit/aba9f18eba870d14fb52c5ba5d73451349e339c3 (v1.6.56)     (CVE-2026-33636)

    Race condition, use-after-free in the Graphics: WebRender component. This vulnerability affects Firefox <     149, Firefox ESR < 115.34, and Firefox ESR < 140.9. (CVE-2026-4684)

    Incorrect boundary conditions in the Graphics: Canvas2D component. This vulnerability affects Firefox <     149, Firefox ESR < 115.34, and Firefox ESR < 140.9. (CVE-2026-4685)

    Incorrect boundary conditions in the Graphics: Canvas2D component. This vulnerability affects Firefox <     149, Firefox ESR < 115.34, and Firefox ESR < 140.9. (CVE-2026-4686)

    Sandbox escape due to incorrect boundary conditions in the Telemetry component. This vulnerability affects     Firefox < 149, Firefox ESR < 115.34, and Firefox ESR < 140.9. (CVE-2026-4687)

    Sandbox escape due to use-after-free in the Disability Access APIs component. This vulnerability affects     Firefox < 149 and Firefox ESR < 140.9. (CVE-2026-4688)

    Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component. This     vulnerability affects Firefox < 149, Firefox ESR < 115.34, and Firefox ESR < 140.9. (CVE-2026-4689)

    Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component. This     vulnerability affects Firefox < 149, Firefox ESR < 115.34, and Firefox ESR < 140.9. (CVE-2026-4690)

    Use-after-free in the CSS Parsing and Computation component. This vulnerability affects Firefox < 149,     Firefox ESR < 115.34, and Firefox ESR < 140.9. (CVE-2026-4691)

    Sandbox escape in the Responsive Design Mode component. This vulnerability affects Firefox < 149, Firefox     ESR < 115.34, and Firefox ESR < 140.9. (CVE-2026-4692)

    Incorrect boundary conditions in the Audio/Video: Playback component. This vulnerability affects Firefox <     149, Firefox ESR < 115.34, and Firefox ESR < 140.9. (CVE-2026-4693)

    Incorrect boundary conditions, integer overflow in the Graphics component. This vulnerability affects     Firefox < 149, Firefox ESR < 115.34, and Firefox ESR < 140.9. (CVE-2026-4694)

    Incorrect boundary conditions in the Audio/Video: Web Codecs component. This vulnerability affects Firefox     < 149 and Firefox ESR < 140.9. (CVE-2026-4695)

    Use-after-free in the Layout: Text and Fonts component. This vulnerability affects Firefox < 149, Firefox     ESR < 115.34, and Firefox ESR < 140.9. (CVE-2026-4696)

    Incorrect boundary conditions in the Audio/Video: Web Codecs component. This vulnerability affects Firefox     < 149 and Firefox ESR < 140.9. (CVE-2026-4697)

    JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability affects Firefox < 149,     Firefox ESR < 115.34, and Firefox ESR < 140.9. (CVE-2026-4698)

    Incorrect boundary conditions in the Layout: Text and Fonts component. This vulnerability affects Firefox     < 149, Firefox ESR < 115.34, and Firefox ESR < 140.9. (CVE-2026-4699)

    Mitigation bypass in the Networking: HTTP component. This vulnerability affects Firefox < 149 and Firefox     ESR < 140.9. (CVE-2026-4700)

    Use-after-free in the JavaScript Engine component. This vulnerability affects Firefox < 149 and Firefox     ESR < 140.9. (CVE-2026-4701)

    JIT miscompilation in the JavaScript Engine component. This vulnerability affects Firefox < 149 and     Firefox ESR < 140.9. (CVE-2026-4702)

    Denial-of-service in the WebRTC: Signaling component. This vulnerability affects Firefox < 149 and Firefox     ESR < 140.9. (CVE-2026-4704)

    Undefined behavior in the WebRTC: Signaling component. This vulnerability affects Firefox < 149 and     Firefox ESR < 140.9. (CVE-2026-4705)

    Incorrect boundary conditions in the Graphics: Canvas2D component. This vulnerability affects Firefox <     149, Firefox ESR < 115.34, and Firefox ESR < 140.9. (CVE-2026-4706)

    Incorrect boundary conditions in the Graphics: Canvas2D component. This vulnerability affects Firefox <     149, Firefox ESR < 115.34, and Firefox ESR < 140.9. (CVE-2026-4707)

    Incorrect boundary conditions in the Graphics component. This vulnerability affects Firefox < 149 and     Firefox ESR < 140.9. (CVE-2026-4708)

    Incorrect boundary conditions in the Audio/Video: GMP component. This vulnerability affects Firefox < 149,     Firefox ESR < 115.34, and Firefox ESR < 140.9. (CVE-2026-4709)

    Incorrect boundary conditions in the Audio/Video component. This vulnerability affects Firefox < 149 and     Firefox ESR < 140.9. (CVE-2026-4710)

    Use-after-free in the Widget: Cocoa component. This vulnerability affects Firefox < 149 and Firefox ESR <     140.9. (CVE-2026-4711)

    Information disclosure in the Widget: Cocoa component. This vulnerability affects Firefox < 149 and     Firefox ESR < 140.9. (CVE-2026-4712)

    Incorrect boundary conditions in the Graphics component. This vulnerability affects Firefox < 149 and     Firefox ESR < 140.9. (CVE-2026-4713)

    Incorrect boundary conditions in the Audio/Video component. This vulnerability affects Firefox < 149 and     Firefox ESR < 140.9. (CVE-2026-4714)

    Uninitialized memory in the Graphics: Canvas2D component. This vulnerability affects Firefox < 149 and     Firefox ESR < 140.9. (CVE-2026-4715)

    Incorrect boundary conditions, uninitialized memory in the JavaScript Engine component. This vulnerability     affects Firefox < 149 and Firefox ESR < 140.9. (CVE-2026-4716)

    Privilege escalation in the Netmonitor component. This vulnerability affects Firefox < 149 and Firefox ESR     < 140.9. (CVE-2026-4717)

    Undefined behavior in the WebRTC: Signaling component. This vulnerability affects Firefox < 149 and     Firefox ESR < 140.9. (CVE-2026-4718)

    Incorrect boundary conditions in the Graphics: Text component. This vulnerability affects Firefox < 149     and Firefox ESR < 140.9. (CVE-2026-4719)

    Memory safety bugs present in Firefox ESR 140.8, Thunderbird ESR 140.8, Firefox 148 and Thunderbird 148.
    Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of     these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 149 and     Firefox ESR < 140.9. (CVE-2026-4720)

    Memory safety bugs present in Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird ESR 140.8, Firefox 148     and Thunderbird 148. Some of these bugs showed evidence of memory corruption and we presume that with     enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects     Firefox < 149, Firefox ESR < 115.34, and Firefox ESR < 140.9. (CVE-2026-4721)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of thunderbird installed on the remote host is prior to 140.9.0-1. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2026-3241 advisory.

    LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable     Network Graphics) raster image files. In versions 1.2.1 through 1.6.55, `png_set_tRNS` and `png_set_PLTE`     each alias a heap-allocated buffer between `png_struct` and `png_info`, sharing a single allocation across     two structs with independent lifetimes. The `trans_alpha` aliasing has been present since at least libpng     1.0, and the `palette` aliasing since at least 1.2.1. Both affect all prior release lines `png_set_tRNS`     sets `png_ptr->trans_alpha = info_ptr->trans_alpha` (256-byte buffer) and `png_set_PLTE` sets     `info_ptr->palette = png_ptr->palette` (768-byte buffer). In both cases, calling `png_free_data` (with     `PNG_FREE_TRNS` or `PNG_FREE_PLTE`) frees the buffer through `info_ptr` while the corresponding `png_ptr`     pointer remains dangling. Subsequent row-transform functions dereference and, in some code paths, write to     the freed memory. A second call to `png_set_tRNS` or `png_set_PLTE` has the same effect, because both     functions call `png_free_data` internally before reallocating the `info_ptr` buffer. Version 1.6.56 fixes     the issue.

    NOTE: https://github.com/pnggroup/libpng/security/advisories/GHSA-m4pc-p4q3-4c7jNOTE:
    https://github.com/pnggroup/libpng/pull/824NOTE: Fixed by:
    https://github.com/pnggroup/libpng/commit/23019269764e35ed8458e517f1897bd3c54820eb (v1.6.56)NOTE: Fixed     by: https://github.com/pnggroup/libpng/commit/a3a21443ed12bfa1ef46fa0d4fb2b74a0fa34a25 (v1.6.56)NOTE:
    Fixed by: https://github.com/pnggroup/libpng/commit/7ea9eea884a2328cc7fdcb3c0c00246a50d90667     (v1.6.56)NOTE: Fixed by:
    https://github.com/pnggroup/libpng/commit/c1b0318b393c90679e6fa5bc1d329fd5d5012ec1 (v1.6.56)     (CVE-2026-33416)

    LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable     Network Graphics) raster image files. In versions 1.6.36 through 1.6.55, an out-of-bounds read and write     exists in libpng's ARM/AArch64 Neon-optimized palette expansion path. When expanding 8-bit paletted rows     to RGB or RGBA, the Neon loop processes a final partial chunk without verifying that enough input pixels     remain. Because the implementation works backward from the end of the row, the final iteration     dereferences pointers before the start of the row buffer (OOB read) and writes expanded pixel data to the     same underflowed positions (OOB write). This is reachable via normal decoding of attacker-controlled PNG     input if Neon is enabled. Version 1.6.56 fixes the issue.

    NOTE: https://github.com/pnggroup/libpng/security/advisories/GHSA-wjr5-c57x-95m2NOTE: Introduced with:
    https://github.com/pnggroup/libpng/commit/7734cda20cf1236aef60f3bbd2267c97bbb40869 (v1.6.36)NOTE: Fixed     by: https://github.com/pnggroup/libpng/commit/aba9f18eba870d14fb52c5ba5d73451349e339c3 (v1.6.56)     (CVE-2026-33636)

    Spoofing issue in Thunderbird. This vulnerability affects Thunderbird < 149 and Thunderbird < 140.9.
    (CVE-2026-3889)

    A malicious mail server could send malformed strings with negative lengths, causing the parser to read     memory outside the buffer. If a mail server or connection to a mail server were compromised, an attacker     could cause the parser to malfunction, potentially crashing Thunderbird or leaking sensitive data. This     vulnerability affects Thunderbird < 149 and Thunderbird < 140.9. (CVE-2026-4371)

    Race condition, use-after-free in the Graphics: WebRender component. This vulnerability affects Firefox <     149, Firefox ESR < 115.34, and Firefox ESR < 140.9. (CVE-2026-4684)

    Incorrect boundary conditions in the Graphics: Canvas2D component. This vulnerability affects Firefox <     149, Firefox ESR < 115.34, and Firefox ESR < 140.9. (CVE-2026-4685)

    Incorrect boundary conditions in the Graphics: Canvas2D component. This vulnerability affects Firefox <     149, Firefox ESR < 115.34, and Firefox ESR < 140.9. (CVE-2026-4686)

    Sandbox escape due to incorrect boundary conditions in the Telemetry component. This vulnerability affects     Firefox < 149, Firefox ESR < 115.34, and Firefox ESR < 140.9. (CVE-2026-4687)

    Sandbox escape due to use-after-free in the Disability Access APIs component. This vulnerability affects     Firefox < 149 and Firefox ESR < 140.9. (CVE-2026-4688)

    Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component. This     vulnerability affects Firefox < 149, Firefox ESR < 115.34, and Firefox ESR < 140.9. (CVE-2026-4689)

    Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component. This     vulnerability affects Firefox < 149, Firefox ESR < 115.34, and Firefox ESR < 140.9. (CVE-2026-4690)

    Use-after-free in the CSS Parsing and Computation component. This vulnerability affects Firefox < 149,     Firefox ESR < 115.34, and Firefox ESR < 140.9. (CVE-2026-4691)

    Sandbox escape in the Responsive Design Mode component. This vulnerability affects Firefox < 149, Firefox     ESR < 115.34, and Firefox ESR < 140.9. (CVE-2026-4692)

    Incorrect boundary conditions in the Audio/Video: Playback component. This vulnerability affects Firefox <     149, Firefox ESR < 115.34, and Firefox ESR < 140.9. (CVE-2026-4693)

    Incorrect boundary conditions, integer overflow in the Graphics component. This vulnerability affects     Firefox < 149, Firefox ESR < 115.34, and Firefox ESR < 140.9. (CVE-2026-4694)

    Incorrect boundary conditions in the Audio/Video: Web Codecs component. This vulnerability affects Firefox     < 149 and Firefox ESR < 140.9. (CVE-2026-4695)

    Use-after-free in the Layout: Text and Fonts component. This vulnerability affects Firefox < 149, Firefox     ESR < 115.34, and Firefox ESR < 140.9. (CVE-2026-4696)

    Incorrect boundary conditions in the Audio/Video: Web Codecs component. This vulnerability affects Firefox     < 149 and Firefox ESR < 140.9. (CVE-2026-4697)

    JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability affects Firefox < 149,     Firefox ESR < 115.34, and Firefox ESR < 140.9. (CVE-2026-4698)

    Incorrect boundary conditions in the Layout: Text and Fonts component. This vulnerability affects Firefox     < 149, Firefox ESR < 115.34, and Firefox ESR < 140.9. (CVE-2026-4699)

    Mitigation bypass in the Networking: HTTP component. This vulnerability affects Firefox < 149 and Firefox     ESR < 140.9. (CVE-2026-4700)

    Use-after-free in the JavaScript Engine component. This vulnerability affects Firefox < 149 and Firefox     ESR < 140.9. (CVE-2026-4701)

    JIT miscompilation in the JavaScript Engine component. This vulnerability affects Firefox < 149 and     Firefox ESR < 140.9. (CVE-2026-4702)

    Denial-of-service in the WebRTC: Signaling component. This vulnerability affects Firefox < 149 and Firefox     ESR < 140.9. (CVE-2026-4704)

    Undefined behavior in the WebRTC: Signaling component. This vulnerability affects Firefox < 149 and     Firefox ESR < 140.9. (CVE-2026-4705)

    Incorrect boundary conditions in the Graphics: Canvas2D component. This vulnerability affects Firefox <     149, Firefox ESR < 115.34, and Firefox ESR < 140.9. (CVE-2026-4706)

    Incorrect boundary conditions in the Graphics: Canvas2D component. This vulnerability affects Firefox <     149, Firefox ESR < 115.34, and Firefox ESR < 140.9. (CVE-2026-4707)

    Incorrect boundary conditions in the Graphics component. This vulnerability affects Firefox < 149 and     Firefox ESR < 140.9. (CVE-2026-4708)

    Incorrect boundary conditions in the Audio/Video: GMP component. This vulnerability affects Firefox < 149,     Firefox ESR < 115.34, and Firefox ESR < 140.9. (CVE-2026-4709)

    Incorrect boundary conditions in the Audio/Video component. This vulnerability affects Firefox < 149 and     Firefox ESR < 140.9. (CVE-2026-4710)

    Use-after-free in the Widget: Cocoa component. This vulnerability affects Firefox < 149 and Firefox ESR <     140.9. (CVE-2026-4711)

    Information disclosure in the Widget: Cocoa component. This vulnerability affects Firefox < 149 and     Firefox ESR < 140.9. (CVE-2026-4712)

    Incorrect boundary conditions in the Graphics component. This vulnerability affects Firefox < 149 and     Firefox ESR < 140.9. (CVE-2026-4713)

    Incorrect boundary conditions in the Audio/Video component. This vulnerability affects Firefox < 149 and     Firefox ESR < 140.9. (CVE-2026-4714)

    Uninitialized memory in the Graphics: Canvas2D component. This vulnerability affects Firefox < 149 and     Firefox ESR < 140.9. (CVE-2026-4715)

    Incorrect boundary conditions, uninitialized memory in the JavaScript Engine component. This vulnerability     affects Firefox < 149 and Firefox ESR < 140.9. (CVE-2026-4716)

    Privilege escalation in the Netmonitor component. This vulnerability affects Firefox < 149 and Firefox ESR     < 140.9. (CVE-2026-4717)

    Undefined behavior in the WebRTC: Signaling component. This vulnerability affects Firefox < 149 and     Firefox ESR < 140.9. (CVE-2026-4718)

    Incorrect boundary conditions in the Graphics: Text component. This vulnerability affects Firefox < 149     and Firefox ESR < 140.9. (CVE-2026-4719)

    Memory safety bugs present in Firefox ESR 140.8, Thunderbird ESR 140.8, Firefox 148 and Thunderbird 148.
    Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of     these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 149 and     Firefox ESR < 140.9. (CVE-2026-4720)

    Memory safety bugs present in Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird ESR 140.8, Firefox 148     and Thunderbird 148. Some of these bugs showed evidence of memory corruption and we presume that with     enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects     Firefox < 149, Firefox ESR < 115.34, and Firefox ESR < 140.9. (CVE-2026-4721)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 8 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2026:8288 advisory.

    Mozilla Thunderbird is a standalone mail and newsgroup client.

    Security Fix(es):

    * firefox: thunderbird: Use-after-free in the JavaScript Engine component (CVE-2026-4701)

    * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird ESR     140.9, Firefox 149 and Thunderbird 149 (CVE-2026-4721)

    * firefox: thunderbird: Privilege escalation in the Netmonitor component (CVE-2026-4717)

    * firefox: thunderbird: Sandbox escape due to use-after-free in the Disability Access APIs component     (CVE-2026-4688)

    * firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4706)

    * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Web Codecs component     (CVE-2026-4695)

    * firefox: thunderbird: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM     component (CVE-2026-4689)

    * firefox: thunderbird: JIT miscompilation in the JavaScript Engine: JIT component (CVE-2026-4698)

    * firefox: thunderbird: Incorrect boundary conditions, uninitialized memory in the JavaScript Engine     component (CVE-2026-4716)

    * firefox: thunderbird: Race condition, use-after-free in the Graphics: WebRender component     (CVE-2026-4684)

    * firefox: thunderbird: Undefined behavior in the WebRTC: Signaling component (CVE-2026-4705)

    * firefox: thunderbird: Uninitialized memory in the Graphics: Canvas2D component (CVE-2026-4715)

    * firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4685)

    * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video component (CVE-2026-4714)

    * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: GMP component (CVE-2026-4709)

    * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video component (CVE-2026-4710)

    * firefox: thunderbird: Information disclosure in the Widget: Cocoa component (CVE-2026-4712)

    * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Web Codecs component     (CVE-2026-4697)

    * firefox: thunderbird: Incorrect boundary conditions in the Graphics component (CVE-2026-4713)

    * firefox: thunderbird: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM     component (CVE-2026-4690)

    * firefox: thunderbird: Use-after-free in the Widget: Cocoa component (CVE-2026-4711)

    * firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4686)

    * firefox: thunderbird: Incorrect boundary conditions in the Graphics component (CVE-2026-4708)

    * firefox: thunderbird: Use-after-free in the CSS Parsing and Computation component (CVE-2026-4691)

    * firefox: thunderbird: Incorrect boundary conditions in the Layout: Text and Fonts component     (CVE-2026-4699)

    * firefox: thunderbird: Use-after-free in the Layout: Text and Fonts component (CVE-2026-4696)

    * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Playback component     (CVE-2026-4693)

    * firefox: thunderbird: Undefined behavior in the WebRTC: Signaling component (CVE-2026-4718)

    * firefox: thunderbird: JIT miscompilation in the JavaScript Engine component (CVE-2026-4702)

    * firefox: thunderbird: Incorrect boundary conditions in the Graphics: Text component (CVE-2026-4719)

    * firefox: thunderbird: Incorrect boundary conditions, integer overflow in the Graphics component     (CVE-2026-4694)

    * firefox: thunderbird: Sandbox escape in the Responsive Design Mode component (CVE-2026-4692)

    * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149     and Thunderbird 149 (CVE-2026-4720)

    * firefox: thunderbird: Mitigation bypass in the Networking: HTTP component (CVE-2026-4700)

    * firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4707)

    * firefox: thunderbird: Denial-of-service in the WebRTC: Signaling component (CVE-2026-4704)

    * firefox: thunderbird: Sandbox escape due to incorrect boundary conditions in the Telemetry component     (CVE-2026-4687)

    * thunderbird: Out of bounds read in IMAP parsing (CVE-2026-4371)

    * thunderbird: Spoofing issue in Thunderbird (CVE-2026-3889)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 7 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2026:8427 advisory.

    Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and     portability.

    Security Fix(es):

    * firefox: thunderbird: Use-after-free in the JavaScript Engine component (CVE-2026-4701)

    * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird ESR     140.9, Firefox 149 and Thunderbird 149 (CVE-2026-4721)

    * firefox: thunderbird: Privilege escalation in the Netmonitor component (CVE-2026-4717)

    * firefox: thunderbird: Sandbox escape due to use-after-free in the Disability Access APIs component     (CVE-2026-4688)

    * firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4706)

    * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Web Codecs component     (CVE-2026-4695)

    * firefox: thunderbird: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM     component (CVE-2026-4689)

    * firefox: thunderbird: JIT miscompilation in the JavaScript Engine: JIT component (CVE-2026-4698)

    * firefox: thunderbird: Incorrect boundary conditions, uninitialized memory in the JavaScript Engine     component (CVE-2026-4716)

    * firefox: thunderbird: Race condition, use-after-free in the Graphics: WebRender component     (CVE-2026-4684)

    * firefox: thunderbird: Undefined behavior in the WebRTC: Signaling component (CVE-2026-4705)

    * firefox: thunderbird: Uninitialized memory in the Graphics: Canvas2D component (CVE-2026-4715)

    * firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4685)

    * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video component (CVE-2026-4714)

    * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: GMP component (CVE-2026-4709)

    * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video component (CVE-2026-4710)

    * firefox: thunderbird: Information disclosure in the Widget: Cocoa component (CVE-2026-4712)

    * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Web Codecs component     (CVE-2026-4697)

    * firefox: thunderbird: Incorrect boundary conditions in the Graphics component (CVE-2026-4713)

    * firefox: thunderbird: Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM     component (CVE-2026-4690)

    * firefox: thunderbird: Use-after-free in the Widget: Cocoa component (CVE-2026-4711)

    * firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4686)

    * firefox: thunderbird: Incorrect boundary conditions in the Graphics component (CVE-2026-4708)

    * firefox: thunderbird: Use-after-free in the CSS Parsing and Computation component (CVE-2026-4691)

    * firefox: thunderbird: Incorrect boundary conditions in the Layout: Text and Fonts component     (CVE-2026-4699)

    * firefox: thunderbird: Use-after-free in the Layout: Text and Fonts component (CVE-2026-4696)

    * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Playback component     (CVE-2026-4693)

    * firefox: thunderbird: Undefined behavior in the WebRTC: Signaling component (CVE-2026-4718)

    * firefox: thunderbird: JIT miscompilation in the JavaScript Engine component (CVE-2026-4702)

    * firefox: thunderbird: Incorrect boundary conditions in the Graphics: Text component (CVE-2026-4719)

    * firefox: thunderbird: Incorrect boundary conditions, integer overflow in the Graphics component     (CVE-2026-4694)

    * firefox: thunderbird: Sandbox escape in the Responsive Design Mode component (CVE-2026-4692)

    * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149     and Thunderbird 149 (CVE-2026-4720)

    * firefox: thunderbird: Mitigation bypass in the Networking: HTTP component (CVE-2026-4700)

    * firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component (CVE-2026-4707)

    * firefox: thunderbird: Denial-of-service in the WebRTC: Signaling component (CVE-2026-4704)

    * firefox: thunderbird: Sandbox escape due to incorrect boundary conditions in the Telemetry component     (CVE-2026-4687)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote MiracleLinux 8 host has a package installed that is affected by multiple vulnerabilities as referenced in the AXSA:2026-444:07 advisory.

    * firefox: thunderbird: Use-after-free in the JavaScript Engine component (CVE-2026-4701)
      * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird     ESR 140.9, Firefox 149 and Thunderbird 149 (CVE-2026-4721)
      * firefox: thunderbird: Privilege escalation in the Netmonitor component (CVE-2026-4717)
      * firefox: thunderbird: Sandbox escape due to use-after-free in the Disability Access APIs component     (CVE-2026-4688)
      * firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component     (CVE-2026-4706)
      * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Web Codecs component     (CVE-2026-4695)
      * firefox: thunderbird: Sandbox escape due to incorrect boundary conditions, integer overflow in the     XPCOM component (CVE-2026-4689)
      * firefox: thunderbird: JIT miscompilation in the JavaScript Engine: JIT component (CVE-2026-4698)
      * firefox: thunderbird: Incorrect boundary conditions, uninitialized memory in the JavaScript Engine     component (CVE-2026-4716)
      * firefox: thunderbird: Race condition, use-after-free in the Graphics: WebRender component     (CVE-2026-4684)
      * firefox: thunderbird: Undefined behavior in the WebRTC: Signaling component (CVE-2026-4705)
      * firefox: thunderbird: Uninitialized memory in the Graphics: Canvas2D component (CVE-2026-4715)
      * firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component     (CVE-2026-4685)
      * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video component (CVE-2026-4714)
      * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: GMP component (CVE-2026-4709)
      * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video component (CVE-2026-4710)
      * firefox: thunderbird: Information disclosure in the Widget: Cocoa component (CVE-2026-4712)
      * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Web Codecs component     (CVE-2026-4697)
      * firefox: thunderbird: Incorrect boundary conditions in the Graphics component (CVE-2026-4713)
      * firefox: thunderbird: Sandbox escape due to incorrect boundary conditions, integer overflow in the     XPCOM component (CVE-2026-4690)
      * firefox: thunderbird: Use-after-free in the Widget: Cocoa component (CVE-2026-4711)
      * firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component     (CVE-2026-4686)
      * firefox: thunderbird: Incorrect boundary conditions in the Graphics component (CVE-2026-4708)
      * firefox: thunderbird: Use-after-free in the CSS Parsing and Computation component (CVE-2026-4691)
      * firefox: thunderbird: Incorrect boundary conditions in the Layout: Text and Fonts component     (CVE-2026-4699)
      * firefox: thunderbird: Use-after-free in the Layout: Text and Fonts component (CVE-2026-4696)
      * firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Playback component     (CVE-2026-4693)
      * firefox: thunderbird: Undefined behavior in the WebRTC: Signaling component (CVE-2026-4718)
      * firefox: thunderbird: JIT miscompilation in the JavaScript Engine component (CVE-2026-4702)
      * firefox: thunderbird: Incorrect boundary conditions in the Graphics: Text component (CVE-2026-4719)
      * firefox: thunderbird: Incorrect boundary conditions, integer overflow in the Graphics component     (CVE-2026-4694)
      * firefox: thunderbird: Sandbox escape in the Responsive Design Mode component (CVE-2026-4692)
      * firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox     149 and Thunderbird 149 (CVE-2026-4720)
      * firefox: thunderbird: Mitigation bypass in the Networking: HTTP component (CVE-2026-4700)
      * firefox: thunderbird: Incorrect boundary conditions in the Graphics: Canvas2D component     (CVE-2026-4707)
      * firefox: thunderbird: Denial-of-service in the WebRTC: Signaling component (CVE-2026-4704)
      * firefox: thunderbird: Sandbox escape due to incorrect boundary conditions in the Telemetry component     (CVE-2026-4687)
      * thunderbird: Out of bounds read in IMAP parsing (CVE-2026-4371)
      * thunderbird: Spoofing issue in Thunderbird (CVE-2026-3889)

Tenable has extracted the preceding description block directly from the MiracleLinux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 7 host has a package installed that is affected by multiple vulnerabilities as referenced in the ELSA-2026-8427 advisory.

    - Update to 140.9.0 ESR [Orabug: 39361657][CVE-2026-4684][CVE-2026-4685]       [CVE-2026-4686][CVE-2026-4687][CVE-2026-4688][CVE-2026-4689][CVE-2026-4690]       [CVE-2026-4691][CVE-2026-4692][CVE-2026-4693][CVE-2026-4694][CVE-2026-4695]       [CVE-2026-4696][CVE-2026-4697][CVE-2026-4698][CVE-2026-4699][CVE-2026-4700]       [CVE-2026-4701][CVE-2026-4702][CVE-2026-4704][CVE-2026-4705][CVE-2026-4706]       [CVE-2026-4707][CVE-2026-4708][CVE-2026-4709][CVE-2026-4710][CVE-2026-4711]       [CVE-2026-4712][CVE-2026-4713][CVE-2026-4714][CVE-2026-4715][CVE-2026-4716]       [CVE-2026-4717][CVE-2026-4718][CVE-2026-4719][CVE-2026-4720][CVE-2026-4721]
    - Update to 140.8.0 ESR [Orabug: 39361647][CVE-2026-2447][CVE-2026-2757]       [CVE-2026-2758][CVE-2026-2759][CVE-2026-2760][CVE-2026-2761][CVE-2026-2762]       [CVE-2026-2763][CVE-2026-2764][CVE-2026-2765][CVE-2026-2766][CVE-2026-2767]       [CVE-2026-2768][CVE-2026-2769][CVE-2026-2770][CVE-2026-2771][CVE-2026-2772]       [CVE-2026-2773][CVE-2026-2774][CVE-2026-2775][CVE-2026-2776][CVE-2026-2777]       [CVE-2026-2778][CVE-2026-2779][CVE-2026-2780][CVE-2026-2781][CVE-2026-2782]       [CVE-2026-2783][CVE-2026-2784][CVE-2026-2785][CVE-2026-2786][CVE-2026-2787]       [CVE-2026-2788][CVE-2026-2789][CVE-2026-2790][CVE-2026-2791][CVE-2026-2792]       [CVE-2026-2793]
    - Update to 140.7.0 ESR [Orabug: 38940976][CVE-2025-14327][CVE-2026-0877]       [CVE-2026-0878][CVE-2026-0879][CVE-2026-0880][CVE-2026-0882][CVE-2026-0883]       [CVE-2026-0884][CVE-2026-0885][CVE-2026-0886][CVE-2026-0887][CVE-2026-0890]       [CVE-2026-0891]
    - Update to 140.6.0 ESR [Orabug: 38813993][CVE-2025-14321][CVE-2025-14322]       [CVE-2025-14323][CVE-2025-14324][CVE-2025-14325][CVE-2025-14328]       [CVE-2025-14329][CVE-2025-14330][CVE-2025-14331][CVE-2025-14333]
    - Update to 140.5.0 ESR [Orabug: 38708474][CVE-2025-13012][CVE-2025-13013]       [CVE-2025-13014][CVE-2025-13015][CVE-2025-13016][CVE-2025-13017]       [CVE-2025-13018][CVE-2025-13019][CVE-2025-13020]
    - Update to 140.4.0 ESR [Orabug: 38595697][CVE-2025-11708][CVE-2025-11709]       [CVE-2025-11710][CVE-2025-11711][CVE-2025-11712][CVE-2025-11714]       [CVE-2025-11715]
    - Update to 140.3.0 [Orabug: 38509157][CVE-2025-10527][CVE-2025-10528]       [CVE-2025-10529][CVE-2025-10532][CVE-2025-10533][CVE-2025-10536]       [CVE-2025-10537]
    - Update to 128.14.0 [Orabug: 38400668][CVE-2025-9179][CVE-2025-9180]       [CVE-2025-9181][CVE-2025-9182][CVE-2025-9185]
    - Update to 128.13.0 [Orabug: 38256809][CVE-2025-8027][CVE-2025-8028]       [CVE-2025-8029][CVE-2025-8030][CVE-2025-8031][CVE-2025-8032][CVE-2025-8033]       [CVE-2025-8034][CVE-2025-8035]

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	名稱	產品	系列	已發布	已更新	嚴重性
305099	RockyLinux 8 : firefox (RLSA-2026:5932)	Nessus	Rocky Linux Local Security Checks	2026/4/6	2026/4/6	critical
305766	RockyLinux 10 : firefox (RLSA-2026:5931)	Nessus	Rocky Linux Local Security Checks	2026/4/9	2026/4/9	critical
306083	RHEL 8 : firefox (RHSA-2026:7842)	Nessus	Red Hat Local Security Checks	2026/4/13	2026/4/13	critical
306160	RHEL 8 : firefox (RHSA-2026:7838)	Nessus	Red Hat Local Security Checks	2026/4/13	2026/4/13	critical
306216	Amazon Linux 2023 : firefox (ALAS2023-2026-1554)	Nessus	Amazon Linux Local Security Checks	2026/4/13	2026/4/13	critical
306281	Amazon Linux 2 : thunderbird, --advisory ALAS2-2026-3241 (ALAS-2026-3241)	Nessus	Amazon Linux Local Security Checks	2026/4/14	2026/4/14	critical
306515	RHEL 8 : thunderbird (RHSA-2026:8288)	Nessus	Red Hat Local Security Checks	2026/4/15	2026/4/15	critical
306725	RHEL 7 : firefox (RHSA-2026:8427)	Nessus	Red Hat Local Security Checks	2026/4/16	2026/4/16	critical
307264	MiracleLinux 8 : thunderbird-140.9.0-1.el8_10.ML.1 (AXSA:2026-444:07)	Nessus	Miracle Linux Local Security Checks	2026/4/17	2026/4/19	critical
320637	Oracle Linux 7 : firefox (ELSA-2026-8427)	Nessus	Oracle Linux Local Security Checks	2026/6/11	2026/6/11	critical

偵測

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