CVE-2026-84122

A use-after-free vulnerability in the Audio/Video component of Firefox can potentially allow an attacker to execute arbitrary code, leading to system compromise. Users of affected Firefox versions should prioritize updating to Firefox 155, Firefox ESR 140.15, or Firefox ESR 153.2 to mitigate this risk. Organizations relying on Firefox for web access should ensure their installations are up to date to protect against potential exploitation.