CVE-2026-6772

HIGH

Incorrect boundary conditions in the Libraries component in NSS

Title source: cna

Description

Incorrect boundary conditions in the Libraries component in NSS. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.

References (6)

https://bugzilla.mozilla.org/show_bug.cgi?id=2026089

https://www.mozilla.org/security/advisories/mfsa2026-30/

https://www.mozilla.org/security/advisories/mfsa2026-31/

https://www.mozilla.org/security/advisories/mfsa2026-32/

https://www.mozilla.org/security/advisories/mfsa2026-33/

https://www.mozilla.org/security/advisories/mfsa2026-34/

Scores

CVSS v3 7.5

EPSS 0.0005

EPSS Percentile 15.1%

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 (8)

mozilla/firefox < 115.35.0

mozilla/firefox < 150.0

Mozilla/Firefox 115.35 - 115.*

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