Improper privilege management in Firefox for Android and Mozilla Firefox - CVE-2026-8952
Published: May 19, 2026
Vulnerability identifier: #VU131853
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-2026-8952
CWE-ID: CWE-269
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 privilege management in the Application Update component when performing update-related operations. A local user can trigger the flaw to escalate privileges.
Affected software
Firefox for Android
Mozilla Firefox
Mozilla Thunderbird
Mozilla Firefox
Mozilla Thunderbird
How to mitigate CVE-2026-8952
Install security update from vendor's website.
Firefox for Android - update to 151.0
Mozilla Firefox - update to 151.0
Mozilla Thunderbird - update to 151.0
Mozilla Firefox - update to 151.0
Mozilla Thunderbird - update to 151.0