CVE-2026-4684 in Mozilla Firefoxinfo

Summary

Race condition, use-after-free in the Graphics: WebRender component. This vulnerability affects Firefox < 149, Firefox ESR < 115.34, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.

Responsible

mozilla

Reservation

03/24/2026

Disclosure

03/24/2026

Entries

VulDB provides additional information and datapoints for this CVE:

ID	Vulnerability	CWE	Exp	Cou	CVE
352732	Mozilla Firefox WebRender use after free	416	Not defined	Official fix	CVE-2026-4684

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