Protection mechanism failure in Firefox for Android and Mozilla Firefox - CVE-2026-92034
Published: September 15, 2026
Vulnerability identifier: #VU150100
CSH Severity: High
CVSS v4: 8.5 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-92034
CWE-ID: CWE-693
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to bypass site isolation.
The vulnerability exists due to improper site isolation in the Graphics component when handling affected functionality. A remote attacker can trigger the flaw to bypass site isolation.
Affected software
Firefox for Android
Mozilla Firefox
Mozilla Firefox
How to mitigate CVE-2026-92034
Install security update from vendor's website.
Firefox for Android - update to 156.0
Mozilla Firefox - update to 156.0
Mozilla Firefox - update to 156.0