Use-After-Free Vulnerability in Firefox CSS Transitions and Animations
CVE-2026-124922

Currently unrated

Key Information:

Vendor: Mozilla
Status: Firefox
Vendor: CVE Published:; 10 November 2026

What is CVE-2026-124922?

A use-after-free vulnerability exists in the CSS Transitions and Animations component of Firefox. This flaw can lead to unexpected behaviors and exploitation by attackers, potentially allowing them to execute arbitrary code. Mozilla addressed this issue in versions Firefox 160 and Firefox ESR 153.7 to enhance user security.

Affected Version(s)

Firefox 153.7

Firefox 160

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2074190

https://www.mozilla.org/security/advisories/mfsa2026-125/

https://www.mozilla.org/security/advisories/mfsa2026-127/

Download the Critical Vulnerability Management Cheat Sheet

Timeline

Vulnerability published
Nov 10, 2026
Vulnerability Reserved
Nov 9, 2026

Credit

Mozilla

CVE-2026-124922 Data

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