openSUSE 16: MozillaFirefox / MozillaFirefox-branding-upstream / etc (openSUSE-SU-2026:21594-1)

critical Nessus Plugin ID 338684

Synopsis

The remote openSUSE host is missing one or more security updates.

Description

The remote openSUSE 16 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:21594-1 advisory.

Update to Firefox Extended Support Release 140.14.0 ESR.

- MFSA 2026-76 (bsc#1274867)
* CVE-2026-74934: Site isolation issue in the Graphics: CanvasWebGL component
* CVE-2026-74935: Privilege escalation in the DOM: Networking component
* CVE-2026-74936: Use-after-free in the JavaScript: WebAssembly component
* CVE-2026-74939: Privilege escalation in the DOM: Navigation component
* CVE-2026-74940: Use-after-free in the Graphics: Text component
* CVE-2026-74941: Privilege escalation in the Graphics: CanvasWebGL component
* CVE-2026-74942: Privilege escalation in the Remote Settings Client component
* CVE-2026-74943: Use-after-free in the Graphics: ImageLib component
* CVE-2026-74944: Use-after-free in the DOM: Core & HTML component
* CVE-2026-74945: Information disclosure in the Graphics: Text component
* CVE-2026-74946: Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component
* CVE-2026-74948: Information disclosure in the Graphics component
* CVE-2026-74949: Privilege escalation due to use-after-free in the Graphics:Canvas2D component
* CVE-2026-74953: Privilege escalation in the Networking: Cookies component
* CVE-2026-74957: Mitigation bypass in the Safe Browsing component
* CVE-2026-74959: Mitigation bypass in the Storage: Cache API component
* CVE-2026-74960: Site isolation issue in the WebExtensions component
* CVE-2026-74962: Site isolation issue in the Networking: Cookies component
* CVE-2026-74963: Same-origin policy bypass in the Networking: Cookies component
* CVE-2026-74964: Integer overflow in the Graphics component
* CVE-2026-74965: Privilege escalation in the Shell Integration component
* CVE-2026-74967: Same-origin policy bypass in the Audio/Video: Playback component
* CVE-2026-74969: Use-after-free in the Layout: Text and Fonts component
* CVE-2026-74971: Information disclosure in the DOM: UI Events & Focus Handling component
* CVE-2026-74972: Information disclosure in the DOM: Push Subscriptions component
* CVE-2026-74973: Race condition, use-after-free in the Graphics component
* CVE-2026-74974: Same-origin policy bypass in the Graphics: ImageLib component
* CVE-2026-74976: JIT miscompilation in the JavaScript Engine: JIT component
* CVE-2026-74983: Mitigation bypass in the Data Loss Prevention component
* CVE-2026-74987: Internally found bugs fixed in Firefox ESR 140.14, Firefox ESR 153.1 and Firefox 154
* CVE-2026-74990: Internally found bugs fixed in Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1 and Firefox 154

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.

Solution

Update the affected packages.

Plugin Details

Severity: Critical

ID: 338684

File Name: openSUSE-2026-21594-1.nasl

Version: 1.2

Type: Local

Agent: unix

Family: SuSE Local Security Checks

Published: 8/21/2026

Updated: 8/21/2026

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Continuous Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.17

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2026-74944

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:novell:opensuse:16.0, p-cpe:/a:novell:opensuse:mozillafirefox-branding-upstream, p-cpe:/a:novell:opensuse:mozillafirefox-devel, p-cpe:/a:novell:opensuse:mozillafirefox-translations-common, p-cpe:/a:novell:opensuse:mozillafirefox-translations-other, p-cpe:/a:novell:opensuse:mozillafirefox

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/SuSE/release, Host/SuSE/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 8/19/2026

Vulnerability Publication Date: 8/18/2026

Reference Information

CVE: CVE-2026-74934, CVE-2026-74935, CVE-2026-74936, CVE-2026-74939, CVE-2026-74940, CVE-2026-74941, CVE-2026-74942, CVE-2026-74943, CVE-2026-74944, CVE-2026-74945, CVE-2026-74946, CVE-2026-74948, CVE-2026-74949, CVE-2026-74953, CVE-2026-74957, CVE-2026-74959, CVE-2026-74960, CVE-2026-74962, CVE-2026-74963, CVE-2026-74964, CVE-2026-74965, CVE-2026-74967, CVE-2026-74969, CVE-2026-74971, CVE-2026-74972, CVE-2026-74973, CVE-2026-74974, CVE-2026-74976, CVE-2026-74983, CVE-2026-74987, CVE-2026-74990

IAVA: 2026-A-0876

Detections

Analytics