CVE-2026-6766

HIGH

Incorrect boundary conditions in the Libraries component in NSS

Title source: cna
STIX 2.1

Description

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.

References (5)

Scores

CVSS v3 7.5
EPSS 0.0004
EPSS Percentile 13.4%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-754
Status published
Products (7)
mozilla/firefox < 140.10.0
mozilla/firefox < 150.0
Mozilla/Firefox 140.10 - 140.*
Mozilla/Firefox 150
mozilla/thunderbird < 140.10.0
Mozilla/Thunderbird 140.10 - 140.*
Mozilla/Thunderbird 150
Published Apr 21, 2026
Tracked Since Apr 21, 2026