CVE-2026-74965

A privilege escalation vulnerability exists in the Shell Integration component of Firefox, allowing attackers to potentially gain elevated permissions on affected systems. Users running versions prior to Firefox 154, Firefox ESR 140.14, and Firefox ESR 153.1 should prioritize updating their browsers to mitigate the risk of exploitation. Organizations relying on Firefox for critical operations should assess their deployment and ensure timely patching to protect against this high-severity threat.