CVE-2026-8970

Privilege escalation in the Security component

High · published May 19, 2026

CVSS v3.1
8.8
EPSS
0%
Percentile
34.7
In the wild
Unconfirmed
What it is

Privilege escalation in the 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
8.8 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00415 · 34.7th percentile
Published
2026-05-19T12:30Z
EPSS history
Timeline
  • 19 MAY 12:30Z
    Privilege escalation in the Security component
    cvelistv5