CVE-2026-6754

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CVSS 3.1

7.5 high

EPSS

<1%p32

Published

Apr 21, 2026 (Apr 21, 2026)

Modified

Jul 15, 2026

Description

Use-after-free in the JavaScript Engine component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.

Vendors: mozilla
Products: firefox, thunderbird
Weakness: CWE-416, CWE-825
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

NVD CVE.org GitHub PoCs EPSS (0.4%)

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