The remote SUSE Linux SLES12 / SLES_SAP12 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:4928-1 advisory.

    Update to Firefox Extended Support Release 153.6.0 ESR (MFSA 2026-112, MFSA 2026-120, bsc#1286385):

    - CVE-2026-100801: Privilege escalation in the DLL Services component.
    - CVE-2026-113470: Cryptographic issue in the Security Block-lists, Allow-lists, and other State component       (bsc#1286261).
    - CVE-2026-117860: Same-origin policy bypass in the DOM: Navigation component.
    - CVE-2026-117861: Sandbox escape in the DOM: Navigation component.
    - CVE-2026-117862: Privilege escalation due to incorrect boundary conditions in the Networking component.
    - CVE-2026-117863: Information disclosure due to uninitialized memory in the Audio/Video component.
    - CVE-2026-117864: Sandbox escape in the Form Manager component.
    - CVE-2026-117865: Use-after-free in the JavaScript: GC component.
    - CVE-2026-117866: Privilege escalation due to use-after-free in the Graphics: Canvas2D component.
    - CVE-2026-117867: Use-after-free in the Layout component.
    - CVE-2026-117868: Sandbox escape in the DOM: Networking component.
    - CVE-2026-117869: Use-after-free in the DOM: Core & HTML component.
    - CVE-2026-117870: Use-after-free in the JavaScript Engine component.
    - CVE-2026-117871: Invalid pointer in the Graphics component.
    - CVE-2026-117872: Use-after-free in the JavaScript: Standard Library component.
    - CVE-2026-117873: Incorrect boundary conditions in the Audio/Video: Playback component.
    - CVE-2026-117874: Use-after-free in the Internationalization component.
    - CVE-2026-117875: Use-after-free in the Layout: Scrolling and Overflow component.
    - CVE-2026-117876: Use-after-free in the Layout: Text and Fonts component.
    - CVE-2026-117877: Use-after-free in the Layout: Text and Fonts component.
    - CVE-2026-117878: Other issue, use-after-free in the Storage: IndexedDB component.
    - CVE-2026-117879: Incorrect boundary conditions in the Layout: Tables component.
    - CVE-2026-117880: Use-after-free in the XML component.
    - CVE-2026-117881: Use-after-free in the DOM: Core & HTML component.
    - CVE-2026-117882: Use-after-free in the Layout component.
    - CVE-2026-117883: Use-after-free in the DOM: HTML Parser component.
    - CVE-2026-117884: Use-after-free in the Networking component.
    - CVE-2026-117885: Use-after-free in the Layout: Grid component.
    - CVE-2026-117886: Incorrect boundary conditions in the Graphics: Text component.
    - CVE-2026-117887: Use-after-free in the DOM: Core & HTML component.
    - CVE-2026-117888: Uninitialized memory in the Graphics: Canvas2D component.
    - CVE-2026-117889: Incorrect boundary conditions in the JavaScript Engine component.
    - CVE-2026-117890: JIT miscompilation in the JavaScript Engine: JIT component.
    - CVE-2026-117891: Use-after-free in the JavaScript Engine: JIT component.
    - CVE-2026-117892: Privilege escalation due to use-after-free in the WebRTC: Networking component.
    - CVE-2026-117893: Incorrect boundary conditions in the Security: PSM component.
    - CVE-2026-117894: Incorrect boundary conditions in the WebRTC: Signaling component.
    - CVE-2026-117895: Use-after-free in the DOM: Core & HTML component.
    - CVE-2026-117896: Use-after-free in the DOM: Core & HTML component.
    - CVE-2026-117897: Incorrect boundary conditions in the Layout: Tables component.
    - CVE-2026-117898: Use-after-free in the JavaScript Engine: JIT component.
    - CVE-2026-117899: Use-after-free in the Networking: HTTP component.
    - CVE-2026-117900: Use-after-free in the DOM: Editor component.
    - CVE-2026-117901: Use-after-free in the DOM: Core & HTML component.
    - CVE-2026-117902: Use-after-free in the Layout: Text and Fonts component.
    - CVE-2026-117903: Use-after-free in the Audio/Video component.
    - CVE-2026-117904: Use-after-free in the JavaScript: GC component.
    - CVE-2026-117905: Use-after-free in the Audio/Video: Playback component.
    - CVE-2026-117906: Use-after-free in the CSS Parsing and Computation component.
    - CVE-2026-117907: Use-after-free in the Networking component.
    - CVE-2026-117908: Use-after-free in the Graphics: ImageLib component.
    - CVE-2026-117909: Use-after-free in the JavaScript: GC component.
    - CVE-2026-117910: Invalid pointer in the JavaScript Engine component.
    - CVE-2026-117911: Use-after-free in the Audio/Video: Playback component.
    - CVE-2026-117912: Same-origin policy bypass in the CSS Parsing and Computation component.
    - CVE-2026-117913: Use-after-free in the SVG component.
    - CVE-2026-117914: Use-after-free in the SVG component.
    - CVE-2026-117915: Incorrect boundary conditions in the Layout: Block and Inline component.
    - CVE-2026-117916: Use-after-free in the XSLT component.
    - CVE-2026-117917: Invalid pointer in the Graphics: WebRender component.
    - CVE-2026-117918: Use-after-free in the Graphics: Canvas2D component.
    - CVE-2026-117919: Use-after-free in the DOM: Core & HTML component.
    - CVE-2026-117920: Use-after-free in the DOM: HTML Parser component.
    - CVE-2026-117921: Use-after-free in the CSS Parsing and Computation component.
    - CVE-2026-117922: Use-after-free in the Networking: WebSockets component.
    - CVE-2026-117923: Use-after-free in the Audio/Video component.
    - CVE-2026-117924: Use-after-free in the XSLT component.
    - CVE-2026-117925: Use-after-free in the DOM: Core & HTML component.
    - CVE-2026-117926: Incorrect boundary conditions in the SVG component.
    - CVE-2026-117927: Use-after-free in the SVG component.
    - CVE-2026-117928: Same-origin policy bypass in the CSS Parsing and Computation component.
    - CVE-2026-117929: Use-after-free in the DOM: Core & HTML component.
    - CVE-2026-117930: Use-after-free in the DOM: Bindings (WebIDL) component.
    - CVE-2026-117931: Use-after-free in the DOM: Events component.
    - CVE-2026-117932: Use-after-free in the DOM: Core & HTML component.
    - CVE-2026-117933: Frame poisoning in the CSS Parsing and Computation component.
    - CVE-2026-117934: Use-after-free in the Layout component.
    - CVE-2026-117935: Use-after-free in the DOM: Bindings (WebIDL) component.
    - CVE-2026-117936: Use-after-free in the DOM: Core & HTML component.
    - CVE-2026-117937: Invalid pointer in the JavaScript Engine component.
    - CVE-2026-117938: Use-after-free in the Layout component.
    - CVE-2026-117939: Use-after-free in the XML component.
    - CVE-2026-117940: Use-after-free in the DOM: Core & HTML component.
    - CVE-2026-117941: Use-after-free in the DOM: CSS Object Model component.
    - CVE-2026-117942: Incorrect boundary conditions in the JavaScript Engine: JIT component.
    - CVE-2026-117943: Use-after-free in the DOM: Core & HTML component.
    - CVE-2026-117944: Use-after-free in the Layout component.
    - CVE-2026-117945: Incorrect boundary conditions in the XML component.
    - CVE-2026-117946: Incorrect boundary conditions in the JavaScript Engine component.
    - CVE-2026-117947: Use-after-free in the XML component.
    - CVE-2026-117948: Use-after-free in the SVG component.
    - CVE-2026-117949: Use-after-free in the DOM: Core & HTML component.
    - CVE-2026-117950: Incorrect boundary conditions in the DOM: Core & HTML component.
    - CVE-2026-117951: Use-after-free in the DOM: Core & HTML component.
    - CVE-2026-117952: Uninitialized memory in the Networking component.
    - CVE-2026-117953: Use-after-free in the DOM: Core & HTML component.
    - CVE-2026-117954: Use-after-free in the Layout: Positioned component.
    - CVE-2026-117955: JIT miscompilation in the JavaScript: WebAssembly component.
    - CVE-2026-117956: Invalid pointer in the Nimbus Desktop Client component.
    - CVE-2026-117957: Cryptographic issue in the WebRTC: Networking component.
    - CVE-2026-117958: Site isolation issue in the Networking: HTTP component.
    - CVE-2026-117959: Site isolation issue in the DOM: Service Workers component.
    - CVE-2026-117960: Spoofing issue in the DOM: Core & HTML component.
    - CVE-2026-117961: Incorrect boundary conditions in the Layout: Text and Fonts component.
    - CVE-2026-117962: Sandbox escape due to incorrect boundary conditions in the Storage: Quota Manager     component.
    - CVE-2026-117963: Incorrect boundary conditions in the DOM: Service Workers component.
    - CVE-2026-117964: Use-after-free in the Panning and Zooming component.
    - CVE-2026-117965: Same-origin policy bypass in the Address Bar component.
    - CVE-2026-117966: Site isolation issue in the Networking: HTTP component.
    - CVE-2026-117967: Mitigation bypass in the DOM: Security component.
    - CVE-2026-117968: Use-after-free in the DOM: Core & HTML component.
    - CVE-2026-117969: Invalid pointer in the JavaScript Engine: JIT component.
    - CVE-2026-117970: Race condition in the Disability Access APIs component.
    - CVE-2026-117971: Sandbox escape due to use-after-free in the Print Preview component.
    - CVE-2026-117972: Use-after-free in the Graphics component.
    - CVE-2026-117973: Use-after-free in the Networking: DNS component.
    - CVE-2026-117974: Use-after-free in the XML component.
    - CVE-2026-117975: Sandbox escape due to invalid pointer in the Graphics: WebRender component.
    - CVE-2026-117976: Site isolation issue in the DOM: Navigation component.
    - CVE-2026-117977: Other issue in the Console component.
    - CVE-2026-117978: Incorrect boundary conditions in the Graphics component.
    - CVE-2026-117979: Incorrect boundary conditions in the Graphics: WebRender component.
    - CVE-2026-117980: Use-after-free in the Graphics component.
    - CVE-2026-117981: Privilege escalation in the Toolkit component.
    - CVE-2026-117982: Invalid pointer in the JavaScript Engine: JIT component.
    - CVE-2026-117983: Use-after-free in the Graphics component.
    - CVE-2026-117984: Incorrect boundary conditions in the Layout: Scrolling and Overflow component.
    - CVE-2026-117985: Sandbox escape due to use-after-free in the Graphics component.
    - CVE-2026-117986: Use-after-free in the Graphics component.
    - CVE-2026-117987: Use-after-free in the Graphics component.
    - CVE-2026-117988: Sandbox escape due to incorrect boundary conditions in the Graphics: CanvasWebGL     component.
    - CVE-2026-117989: Use-after-free in the Graphics component.
    - CVE-2026-117990: Sandbox escape due to incorrect boundary conditions in the Graphics: WebRender     component.
    - CVE-2026-117991: Incorrect boundary conditions in the Layout: Text and Fonts component.
    - CVE-2026-117992: Information disclosure in the CSS Parsing and Computation component.
    - CVE-2026-117993: Integer overflow in the Graphics: Text component.
    - CVE-2026-117994: Use-after-free in the JavaScript: GC component.
    - CVE-2026-117995: Privilege escalation in the DOM: UI Events & Focus Handling component.
    - CVE-2026-117996: Incorrect boundary conditions in the WebRTC component.
    - CVE-2026-117997: Sandbox escape due to use-after-free in the Widget component.
    - CVE-2026-117998: Mitigation bypass in the DOM: Push Subscriptions component.
    - CVE-2026-117999: Race condition in the IPC component.
    - CVE-2026-118000: Information disclosure in the Networking: HTTP component.
    - CVE-2026-118002: Information disclosure due to race condition in the Networking component.
    - CVE-2026-118003: Information disclosure in the Networking: DNS component.
    - CVE-2026-118004: Incorrect boundary conditions in the CSS Transitions and Animations component.

Tenable has extracted the preceding description block directly from the SUSE 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 macOS or Mac OS X host is prior to 153.6. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2026-122 advisory.

  - Privilege escalation in the DLL Services component. This vulnerability was fixed in Firefox ESR 153.4,     Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 159, Firefox ESR 153.6, Thunderbird 159,     Thunderbird 153.6, Firefox 157, and Firefox ESR 140.17. (CVE-2026-100801)

  - When a message containing an OpenPGP key attachment was displayed, Thunderbird automatically loaded the     attachment's content to offer importing the key. A sender could mark the attachment as an external     attachment pointing to an arbitrary URL, which Thunderbird then loaded without any user interaction,     bypassing remote content blocking. On Windows, a URL pointing to an attacker-controlled network share     could leak the user's NTLM credentials.  The NTLM credential leak only affects Thunderbird on Windows. On     other operating systems, the issue allowed a remote request that bypassed remote content blocking.
    (CVE-2026-118174)

  - When replying to, forwarding, or editing a crafted email message as new, Thunderbird could embed parts of     a different message stored in the same folder into the message being composed, without showing a blocked     content warning. If the user sent the message, the content of the other message was disclosed to the     recipients. (CVE-2026-118175)

  - Thunderbird's check that prevents mailbox: URLs from accessing files on remote Windows network shares     could be bypassed using extended-length UNC paths. Displaying a specially crafted email could cause     Thunderbird to connect to an SMB server chosen by the attacker, disclosing the user's Windows account name     and NTLM authentication data, which could be used for offline password cracking or relay attacks.  This     bug only affects Thunderbird on Windows. Other operating systems are unaffected. (CVE-2026-118176)

  - When looking for calendars in a directory on a server, during account setup or when adding a new network     calendar, Thunderbird accepted calendar locations pointing to other servers, local files or network     shares. A malicious server, or a network attacker when the lookup used plain HTTP, could make Thunderbird     subscribe to such a location. On Windows this could leak the user's NTLM credentials to an attacker-     controlled host on every calendar refresh, and changes to the calendar could be written to the attacker's     share or overwrite a local file. (CVE-2026-118177)

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 Firefox ESR installed on the remote macOS or Mac OS X host is prior to 153.6. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2026-120 advisory.

  - Privilege escalation in the DLL Services component. This vulnerability was fixed in Firefox ESR 153.4,     Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 159, Firefox ESR 153.6, Thunderbird 159,     Thunderbird 153.6, Firefox 157, and Firefox ESR 140.17. (CVE-2026-100801)

  - Same-origin policy bypass in the DOM: Navigation component. This vulnerability was fixed in Firefox 159,     Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6. (CVE-2026-117860)

  - Sandbox escape in the DOM: Navigation component. This vulnerability was fixed in Firefox 159, Firefox ESR     153.6, Thunderbird 159, and Thunderbird 153.6. (CVE-2026-117861)

  - Privilege escalation due to incorrect boundary conditions in the Networking component. This vulnerability     was fixed in Firefox 159, Firefox ESR 115.44, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
    (CVE-2026-117862)

  - Information disclosure due to uninitialized memory in the Audio/Video component. This vulnerability was     fixed in Firefox 159, Firefox ESR 115.44, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
    (CVE-2026-117863)

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

The remote Fedora 45 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-40997bb156 advisory.

    - Updated to latest upstream (159.0)

Tenable has extracted the preceding description block directly from the Fedora 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 10 host has a package installed that is affected by multiple vulnerabilities as referenced in the ELSA-2026-93956 advisory.

    [153.6.0-1.0.1]
    - Fix firefox-oracle-default-prefs.js for new nss [Orabug: 37079773]
    - Add firefox-oracle-default-prefs.js and remove the corresponding Red Hat file

    [153.6.0-1]
    - Update to 153.6.0 ESR

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	Name	Product	Family	Published	Updated	Severity
374093	SUSE SLES12: MozillaFirefox / MozillaFirefox-devel / etc (SUSE-SU-2026:4928-1)	Nessus	SuSE Local Security Checks	10/30/2026	11/2/2026	critical
372624	Mozilla Thunderbird < 153.6	Nessus	MacOS X Local Security Checks	10/27/2026	11/6/2026	critical
372629	Mozilla Firefox ESR < 153.6	Nessus	MacOS X Local Security Checks	10/27/2026	11/6/2026	critical
374673	Fedora 45 : firefox (2026-40997bb156)	Nessus	Fedora Local Security Checks	10/31/2026	11/6/2026	critical
376147	Oracle Linux 10 : firefox (ELSA-2026-93956)	Nessus	Oracle Linux Local Security Checks	11/4/2026	11/6/2026	critical

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