CVE-2026-74944

A use-after-free vulnerability in the DOM Core and HTML components of Firefox could allow an attacker to execute arbitrary code or crash the browser, potentially leading to unauthorized access or data leakage. Users running affected versions of Firefox should prioritize updating to Firefox 154, Firefox ESR 140.14, or Firefox ESR 153.1 to mitigate the risk. This issue is particularly relevant for organizations relying on Firefox for secure web browsing.