Input validation error in Firefox for Android - CVE-2026-84135
Published: September 1, 2026
Vulnerability identifier: #VU146633
CSH Severity: Low
CVSS v4: 2.1 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-84135
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to bypass implemented security restrictions.
The vulnerability exists due to an unspecified error. A remote attacker can bypass implemented security restrictions.
Affected software
Firefox for Android
How to mitigate CVE-2026-84135
Install updates from vendor's website.
Firefox for Android - update to 155.0