Detections
Analytics

Mozilla Firefox < 150.0.3

critical Nessus Plugin ID 314316

Synopsis

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

Description

The version of Firefox installed on the remote macOS or Mac OS X host is prior to 150.0.3. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2026-45 advisory.

 - Sandbox escape in the Profile Backup component. This vulnerability was fixed in Firefox 150.0.3.
 (CVE-2026-8401)

 - Use-after-free in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 150.0.3.
 (CVE-2026-8390)

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 version 150.0.3 or later.

See Also

https://www.mozilla.org/en-US/security/advisories/mfsa2026-45/

Plugin Details

Severity: Critical

ID: 314316

File Name: macos_firefox_150_0_3.nasl

Version: 1.2

Type: Local

Agent: macosx

Published: 5/12/2026

Updated: 5/12/2026

Supported Sensors: Nessus Agent, Nessus

Risk Information

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-2026-8401

CVSS v3

Risk Factor: Critical

Base Score: 10

Temporal Score: 8.7

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/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

Required KB Items: installed_sw/Mozilla Firefox

Exploit Ease: No known exploits are available

Patch Publication Date: 5/12/2026

Vulnerability Publication Date: 5/12/2026

Reference Information

CVE: CVE-2026-8388, CVE-2026-8389, CVE-2026-8390, CVE-2026-8391, CVE-2026-8401