CVE-2026-100771

A vulnerability exists in the DOM: Streams component of Firefox, leading to potential undefined behavior that could be exploited. 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 potential security risks. Organizations relying on Firefox for web access should assess their deployment and ensure timely updates to protect against this issue.