CVE-2026-16351

CriticalCVSS 9.8/10Last modified Oct 24, 2026

Description

Sandbox escape due to use-after-free in the DOM: Navigation component. This vulnerability was fixed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-416

Affected software

No affected versions have been published.

Timeline

Published
Jul 21, 2026
Last modified
Oct 24, 2026
NVD status
Analyzed

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CVE-2026-16351: Critical severity, CVSS 9.8 | Vulnix