Detections
Analytics

Mozilla Firefox ESR < 115.44

critical Nessus Plugin ID 372623

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 115.44. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2026-119 advisory.

 - Sandbox escape due to incorrect boundary conditions in the Networking component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, Thunderbird 153.5, and Firefox ESR 115.44.
 (CVE-2026-109708)

 - Sandbox escape, site isolation issue due to incorrect boundary conditions, use-after-free in the Networking component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, Thunderbird 153.5, and Firefox ESR 115.44. (CVE-2026-109705)

 - 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)

 - Privilege escalation due to use-after-free in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
 (CVE-2026-117866)

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 115.44 or later.

See Also

https://www.mozilla.org/en-US/security/advisories/mfsa2026-119/

Plugin Details

Severity: Critical

ID: 372623

File Name: macos_firefox_115_44_esr.nasl

Version: 1.1

Type: Local

Agent: macosx

Published: 10/27/2026

Updated: 10/27/2026

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: High

Score: 7

Percentile: 97.98

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-2026-109708

CVSS v3

Risk Factor: Critical

Base Score: 9.6

Temporal Score: 8.3

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/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: 10/27/2026

Vulnerability Publication Date: 10/13/2026

Reference Information

CVE: CVE-2026-109705, CVE-2026-109707, CVE-2026-109708, CVE-2026-117862, CVE-2026-117863, CVE-2026-117866, CVE-2026-117867, CVE-2026-117868, CVE-2026-117869, CVE-2026-117870, CVE-2026-117872, CVE-2026-117873, CVE-2026-117874, CVE-2026-117876, CVE-2026-117878, CVE-2026-117879, CVE-2026-117880, CVE-2026-117881, CVE-2026-117882, CVE-2026-117883, CVE-2026-117884, CVE-2026-117886, CVE-2026-117887, CVE-2026-117889, CVE-2026-117891, CVE-2026-117892, CVE-2026-117893, CVE-2026-117895, CVE-2026-117896, CVE-2026-117897, CVE-2026-117899, CVE-2026-117900, CVE-2026-117901, CVE-2026-117903, CVE-2026-117905, CVE-2026-117906, CVE-2026-117907, CVE-2026-117908, CVE-2026-117911, CVE-2026-117912, CVE-2026-117914, CVE-2026-117915, CVE-2026-117917, CVE-2026-117918, CVE-2026-117919, CVE-2026-117921, CVE-2026-117922, CVE-2026-117923, CVE-2026-117924, CVE-2026-117925, CVE-2026-117926, CVE-2026-117927, CVE-2026-117929, CVE-2026-117930, CVE-2026-117931, CVE-2026-117934, CVE-2026-117935, CVE-2026-117936, CVE-2026-117937, CVE-2026-117938, CVE-2026-117939, CVE-2026-117941, CVE-2026-117942, CVE-2026-117943, CVE-2026-117944, CVE-2026-117946, CVE-2026-117948, CVE-2026-117949, CVE-2026-117950, CVE-2026-117951, CVE-2026-117952, CVE-2026-117954, CVE-2026-117966, CVE-2026-117968, CVE-2026-117971, CVE-2026-117974, CVE-2026-117978, CVE-2026-117979, CVE-2026-117992, CVE-2026-118027