CVE-2026-100789

A use-after-free vulnerability in the Graphics: Canvas2D component of Firefox can allow attackers to execute arbitrary code, potentially compromising user systems. Users of affected Firefox versions should prioritize updating to the fixed releases, specifically Firefox ESR 153.4, Firefox 157, Firefox ESR 115.42, or Firefox ESR 140.17, to mitigate the risk. Organizations and individuals relying on Firefox for web browsing should address this high-severity issue promptly to protect against potential exploitation.