CVE-2026-4727

Denial-of-service in the Libraries component in NSS

High · published March 24, 2026

CVSS v3.1
7.5
EPSS
1%
Percentile
44.4
In the wild
Unconfirmed
What it is

Denial-of-service in the Libraries component in NSS. This vulnerability was fixed in Firefox 149 and Thunderbird 149.

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:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00537 · 44.4th percentile
Published
2026-03-24T12:30Z
EPSS history
Timeline
  • 24 MAR 12:30Z
    Denial-of-service in the Libraries component in NSS
    cvelistv5