#VU123240 Protection mechanism failure in Mozilla Firefox and Firefox for Android - CVE-2026-2803
Published: February 25, 2026
Vulnerability identifier: #VU123240
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-2803
CWE-ID: CWE-693
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Mozilla Firefox
Firefox for Android
Mozilla Firefox
Firefox for Android
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 Settings UI component. An attacker can bypass implemented security restrictions and gain access to sensitive information.
Remediation
Install updates from vendor's website.