CVE-2026-6766

Incorrect boundary conditions in the Libraries component in NSS

High · published April 21, 2026

CVSS v3.1
7.5
EPSS
0%
Percentile
36.3
In the wild
Unconfirmed
What it is

Incorrect boundary conditions in the Libraries component in NSS. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00431 · 36.3th percentile
Published
2026-04-21T12:40Z
EPSS history
Timeline
  • 21 APR 12:40Z
    Incorrect boundary conditions in the Libraries component in NSS
    cvelistv5