The remote RockyLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2026:58898 advisory.

    * firefox: thunderbird: Mitigation bypass in the Data Loss Prevention component (CVE-2026-74983)

    * firefox: thunderbird: Site isolation issue in the Graphics: CanvasWebGL component (CVE-2026-74934)

    * firefox: thunderbird: Privilege escalation in the Networking: Cookies component (CVE-2026-74953)

    * firefox: thunderbird: Internally found bugs fixed in Firefox ESR 140.14, Firefox ESR 153.1 and Firefox     154 (CVE-2026-74987)

    * firefox: thunderbird: Information disclosure in the Graphics component (CVE-2026-74948)

    * firefox: thunderbird: Use-after-free in the Graphics: ImageLib component (CVE-2026-74943)

    * firefox: thunderbird: Information disclosure in the DOM: UI Events & Focus Handling component     (CVE-2026-74971)

    * firefox: thunderbird: Privilege escalation in the Graphics: CanvasWebGL component (CVE-2026-74941)

    * firefox: Privilege escalation in the Shell Integration component (CVE-2026-74965)

    * firefox: thunderbird: Privilege escalation due to incorrect boundary conditions in the Graphics:
    CanvasWebGL component (CVE-2026-74946)

    * firefox: Race condition, use-after-free in the Graphics component (CVE-2026-74973)

    * firefox: thunderbird: Privilege escalation due to use-after-free in the Graphics: Canvas2D component     (CVE-2026-74949)

    * firefox: thunderbird: Internally found bugs fixed in Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR     153.1 and Firefox 154 (CVE-2026-74990)

    * firefox: thunderbird: Use-after-free in the JavaScript: WebAssembly component (CVE-2026-74936)

    * firefox: thunderbird: Use-after-free in the Graphics: Text component (CVE-2026-74940)

    * firefox: thunderbird: Site isolation issue in the WebExtensions component (CVE-2026-74960)

    * firefox: thunderbird: Use-after-free in the Layout: Text and Fonts component (CVE-2026-74969)

    * firefox: thunderbird: Mitigation bypass in the Storage: Cache API component (CVE-2026-74959)

    * firefox: thunderbird: JIT miscompilation in the JavaScript Engine: JIT component (CVE-2026-74976)

    * firefox: thunderbird: Same-origin policy bypass in the Graphics: ImageLib component (CVE-2026-74974)

    * firefox: thunderbird: Mitigation bypass in the Safe Browsing component (CVE-2026-74957)

    * firefox: thunderbird: Same-origin policy bypass in the Audio/Video: Playback component (CVE-2026-74967)

    * firefox: Privilege escalation in the Remote Settings Client component (CVE-2026-74942)

    * firefox: thunderbird: Privilege escalation in the DOM: Navigation component (CVE-2026-74939)

    * firefox: thunderbird: Information disclosure in the DOM: Push Subscriptions component (CVE-2026-74972)

    * firefox: thunderbird: Information disclosure in the Graphics: Text component (CVE-2026-74945)

    * firefox: thunderbird: Same-origin policy bypass in the Networking: Cookies component (CVE-2026-74963)

    * firefox: thunderbird: Use-after-free in the DOM: Core & HTML component (CVE-2026-74944)

    * firefox: Integer overflow in the Graphics component (CVE-2026-74964)

    * firefox: Site isolation issue in the Networking: Cookies component (CVE-2026-74962)

    * firefox: thunderbird: Privilege escalation in the DOM: Networking component (CVE-2026-74935)

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.

Detections

Analytics

RockyLinux 8 : firefox (RLSA-2026:58898)

critical Nessus Plugin ID 339411

Version 1.2

Version 1.1

Version 1.2 Aug 29, 2026, 12:30 AM Plugin metadata (Add IAVM Info) Plugin Feed: 202608290030
Version 1.1 Aug 25, 2026, 3:54 PM New Plugin Feed: 202608251554