CVE-2026-100791

A use-after-free vulnerability in the DOM Core and HTML components of Firefox can lead to potential code execution, allowing attackers to exploit the flaw to execute arbitrary code on affected systems. Users of Firefox, particularly those on versions prior to the fixed releases (Firefox ESR 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17), should prioritize updating their browsers to mitigate this high-severity risk. Organizations relying on Firefox for their operations must ensure their installations are up to date to protect against potential exploitation.