CVE-2026-6754

· NIST NVD ↗

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.

HIGH

CVSS severity

7.5

CVSS base score

2026-04-21

Published

CWE codes

CWE-416

Affected products

mozilla:firefoxmozilla:thunderbird

Sources

NIST NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-6754