CVE-2026-6760

Mitigation bypass in the Networking: Cookies component

Critical · published April 21, 2026

CVSS v3.1
9.8
EPSS
1%
Percentile
42.9
In the wild
Unconfirmed
What it is

Mitigation bypass in the Networking: Cookies component. This vulnerability was fixed in Firefox 150 and Thunderbird 150.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00514 · 42.9th percentile
Published
2026-04-21T12:40Z
EPSS history
Timeline
  • 21 APR 12:40Z
    Mitigation bypass in the Networking: Cookies component
    cvelistv5