CVE-2026-100781

A vulnerability in the WebRender component of Firefox allows for a sandbox escape due to incorrect boundary conditions, potentially enabling attackers to execute arbitrary code outside the intended security confines. Users of affected Firefox versions should prioritize updating to the fixed releases (Firefox ESR 153.4, 157, ESR 115.42, and ESR 140.17) to mitigate the risk of exploitation. Organizations relying on Firefox for secure browsing should assess their deployment and ensure timely updates to safeguard against this issue.