CVE-2026-8962

Mitigation bypass in the DOM: Security component

High · published May 19, 2026

CVSS v3.1
8.1
EPSS
0%
Percentile
33.2
In the wild
Unconfirmed
What it is

Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.

The record
Technical detail
CVSS v3.1
8.1 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00401 · 33.2th percentile
Published
2026-05-19T12:29Z
EPSS history
Timeline
  • 19 MAY 12:29Z
    Mitigation bypass in the DOM: Security component
    cvelistv5