CVE-2026-12316

Mitigation bypass in the DOM: Security component

Critical · published June 16, 2026

CVSS v3.1
9.1
EPSS
0%
Percentile
14.9
In the wild
Unconfirmed
What it is

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

The record
Technical detail
CVSS v3.1
9.1 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00245 · 14.9th percentile
Published
2026-06-16T11:52Z
EPSS history
Timeline
  • 16 JUN 11:52Z
    Mitigation bypass in the DOM: Security component
    cvelistv5