CVE-2026-100767

A use-after-free vulnerability in the Networking: Cache component of Firefox could allow an attacker to execute arbitrary code, potentially compromising user systems. Users of affected Firefox versions, particularly those on older releases, should prioritize updating to the patched versions (Firefox ESR 153.4, 157, 115.42, and 140.17) to mitigate the risk of exploitation. This issue is critical for organizations relying on Firefox for secure browsing, as it poses a significant threat to user data and system integrity.