#VU123686 Protection mechanism failure in Firefox for Android and Mozilla Firefox - CVE-2026-3846
Published: March 10, 2026
Vulnerability identifier: #VU123686
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-3846
CWE-ID: CWE-693
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Firefox for Android
Mozilla Firefox
Firefox for Android
Mozilla Firefox
Software vendor:
Mozilla
Mozilla
Description
The vulnerability allows a remote attacker to bypass implemented security restrictions.
The vulnerability exists due to insufficient implementation of security measures in the CSS Parsing and Computation component. A remote attacker can trick he victim into visiting a specially crafted website and bypass same-origin policy restrictions.
Remediation
Install updates from vendor's website.