CVE-2026-124922 is a use-after-free vulnerability in the CSS Transitions and Animations component of Firefox. This flaw was addressed and fixed in Firefox version 160 and Firefox ESR 153.7. The vulnerability has a high severity rating with a CVSS score of 8.8, indicating it can lead to significant impact including confidentiality, integrity, and availability compromise. No known exploits in the wild have been reported as of the advisory date.