CVE-2026-12316

9.1 CRITICAL

Published: June 16, 2026 Modified: June 16, 2026

Description

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

Get an AI-powered plain-language explanation of this vulnerability and remediation steps.

0.0 Low Medium High Critical 10.0

Vector String

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

Patch Vendor Advisory Exploit Third Party Advisory

Source: security@mozilla.org

Source: security@mozilla.org

Source: security@mozilla.org

3 reference(s) from NVD

CVSS v3 Score

9.1 / 10.0

EPSS (Exploit Probability)

0.3%

19th percentile

Exploitation Status

Not in CISA KEV

CWE-693