Detections
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Mozilla Firefox ESR < 115.41

critical Nessus Plugin ID 345900

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Synopsis

A web browser installed on the remote macOS or Mac OS X host is affected by multiple vulnerabilities.

Description

The version of Firefox ESR installed on the remote macOS or Mac OS X host is prior to 115.41. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2026-91 advisory.

 - Privilege escalation in the WebExtensions component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, and Firefox ESR 153.3. (CVE-2026-92015)

 - Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, and Firefox ESR 153.3.
 (CVE-2026-92006, CVE-2026-92007, CVE-2026-92008, CVE-2026-92009, CVE-2026-92010, CVE-2026-92011, CVE-2026-92012, CVE-2026-92013)

 - Privilege escalation due to incorrect boundary conditions in the Graphics component. This vulnerability was fixed in Firefox ESR 115.41 and Firefox ESR 140.16. (CVE-2026-92014)

 - Sandbox escape in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, and Firefox ESR 153.3. (CVE-2026-92018)

 - Mitigation bypass in the Remote Settings Client component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, and Firefox ESR 153.3. (CVE-2026-92019)

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

Solution

Upgrade to Mozilla Firefox ESR version 115.41 or later.

See Also

https://www.mozilla.org/en-US/security/advisories/mfsa2026-91/

Plugin Details

Severity: Critical

ID: 345900

File Name: macos_firefox_115_41_esr.nasl

Version: 1.1

Type: Local

Agent: macosx

Published: 9/15/2026

Updated: 9/15/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 5

Percentile: 93.38

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

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

CVSS Score Source: CVE-2026-92015

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:/a:mozilla:firefox_esr

Required KB Items: installed_sw/Mozilla Firefox ESR

Exploit Ease: No known exploits are available

Patch Publication Date: 9/15/2026

Vulnerability Publication Date: 9/15/2026

Reference Information

CVE: CVE-2026-92006, CVE-2026-92007, CVE-2026-92008, CVE-2026-92009, CVE-2026-92010, CVE-2026-92011, CVE-2026-92012, CVE-2026-92013, CVE-2026-92014, CVE-2026-92015, CVE-2026-92017, CVE-2026-92018, CVE-2026-92019, CVE-2026-92020, CVE-2026-92022, CVE-2026-92023, CVE-2026-92024, CVE-2026-92025, CVE-2026-92027, CVE-2026-92028, CVE-2026-92029