CVE-2026-6754

HighCVSS 7.5/10Last modified Oct 25, 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.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-416 CWE-825

Affected software

No affected versions have been published.

Timeline

Published: Apr 21, 2026
Last modified: Oct 25, 2026
NVD status: Modified

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