CVE-2026-100758

A sandbox escape vulnerability exists in the Navigation component of Firefox, potentially allowing attackers to bypass security restrictions and execute arbitrary code within the browser environment. Users of affected Firefox versions, particularly those running older releases, should prioritize updating to the fixed versions (Firefox ESR 153.4, 157, ESR 115.42, or ESR 140.17) to mitigate the risk of exploitation. This issue is critical for organizations relying on Firefox for secure browsing, as it could lead to significant security breaches.