Main Vulnerability Database Vulnerabilities #VU144099

Improper access control in Mozilla Firefox and Firefox for Android - CVE-2026-74952

Published: August 18, 2026

Vulnerability identifier: #VU144099

CSH Severity: Low

CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-74952

CWE-ID: CWE-284

Exploitation vector: Local access

Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to escalate privileges.

The vulnerability exists due to improper access control in the Application Update component when performing update operations. A local user can trigger the vulnerable component to escalate privileges.

Affected software

Mozilla Firefox
Firefox for Android

How to mitigate CVE-2026-74952

Install security update from vendor's website.

Mozilla Firefox - update to 154.0
Firefox for Android - update to 154.0

External References

Related Security Bulletins