Detections
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Mozilla Firefox ESR < 153.7

critical Nessus Plugin ID 378430

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 153.7. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2026-127 advisory.

 - Incorrect boundary conditions, use-after-free in the Graphics component. This vulnerability was fixed in Firefox 160, Firefox ESR 153.7, and Thunderbird 160. (CVE-2026-124948)

 - Sandbox escape due to use-after-free in the Widget: Gtk component. This vulnerability was fixed in Firefox 160, Firefox ESR 153.7, and Thunderbird 160. (CVE-2026-124917)

 - Sandbox escape due to incorrect boundary conditions in the Graphics: Text component. This vulnerability was fixed in Firefox 160, Firefox ESR 115.45, Firefox ESR 153.7, and Thunderbird 160. (CVE-2026-124853)

 - Privilege escalation in the DOM: Navigation component. This vulnerability was fixed in Firefox 160, Firefox ESR 153.7, and Thunderbird 160. (CVE-2026-124854)

 - Sandbox escape in the DOM: Navigation component. This vulnerability was fixed in Firefox 160, Firefox ESR 153.7, and Thunderbird 160. (CVE-2026-124855)

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 153.7 or later.

See Also

https://www.mozilla.org/en-US/security/advisories/mfsa2026-127/

Plugin Details

Severity: Critical

ID: 378430

File Name: macos_firefox_153_7_esr.nasl

Version: 1.1

Type: Local

Agent: macosx

Published: 11/10/2026

Updated: 11/10/2026

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5

Percentile: 92.8

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-2026-124948

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

CVSS Score Source: CVE-2026-124917

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: 11/10/2026

Vulnerability Publication Date: 10/27/2026

Reference Information

CVE: CVE-2026-118007, CVE-2026-118019, CVE-2026-118021, CVE-2026-118024, CVE-2026-124853, CVE-2026-124854, CVE-2026-124855, CVE-2026-124856, CVE-2026-124857, CVE-2026-124858, CVE-2026-124859, CVE-2026-124860, CVE-2026-124861, CVE-2026-124862, CVE-2026-124863, CVE-2026-124864, CVE-2026-124865, CVE-2026-124866, CVE-2026-124868, CVE-2026-124869, CVE-2026-124870, CVE-2026-124872, CVE-2026-124873, CVE-2026-124874, CVE-2026-124875, CVE-2026-124876, CVE-2026-124877, CVE-2026-124879, CVE-2026-124880, CVE-2026-124881, CVE-2026-124882, CVE-2026-124883, CVE-2026-124884, CVE-2026-124885, CVE-2026-124886, CVE-2026-124887, CVE-2026-124888, CVE-2026-124889, CVE-2026-124890, CVE-2026-124891, CVE-2026-124892, CVE-2026-124893, CVE-2026-124894, CVE-2026-124895, CVE-2026-124896, CVE-2026-124897, CVE-2026-124898, CVE-2026-124899, CVE-2026-124901, CVE-2026-124902, CVE-2026-124903, CVE-2026-124905, CVE-2026-124906, CVE-2026-124907, CVE-2026-124909, CVE-2026-124910, CVE-2026-124912, CVE-2026-124913, CVE-2026-124914, CVE-2026-124915, CVE-2026-124917, CVE-2026-124918, CVE-2026-124919, CVE-2026-124922, CVE-2026-124924, CVE-2026-124926, CVE-2026-124927, CVE-2026-124929, CVE-2026-124930, CVE-2026-124931, CVE-2026-124932, CVE-2026-124933, CVE-2026-124934, CVE-2026-124935, CVE-2026-124938, CVE-2026-124939, CVE-2026-124940, CVE-2026-124941, CVE-2026-124942, CVE-2026-124948, CVE-2026-124951

IAVA: 2026-A-1218