CVE-2026-16379

A privilege escalation vulnerability exists in the DOM: Content Processes component of Firefox, which could allow an attacker to gain elevated permissions within the browser. This issue affects users of Firefox and Thunderbird versions prior to the fixes in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13. Organizations and users relying on these applications should prioritize updating to the latest versions to mitigate potential exploitation risks.