CVE-2026-12316

CriticalCVSS 9.1/10Last modified Oct 26, 2026

Description

Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 152 and Thunderbird 152.

Metrics

CVSS 3.1 9.1/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Weakness enumeration

CWE-693

Affected software

VendorProductVersions
MozillaFirefox—
MozillaThunderbird—

References

Timeline

Published
Jun 16, 2026
Last modified
Oct 26, 2026
NVD status
Analyzed

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CVE-2026-12316: Critical severity, CVSS 9.1 | Vulnix