CVE-2026-4684

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CVSS 3.1

7.5 high

EPSS

<1%p28

Published

Mar 24, 2026 (Mar 24, 2026)

Modified

Jul 15, 2026

Description

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

Vendors: mozilla
Products: firefox
Weakness: CWE-362, CWE-416, CWE-364
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

NVD CVE.org GitHub PoCs EPSS (0.4%)

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