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.
History

Wed, 22 Apr 2026 15:00:00 +0000

Type Values Removed Values Added
First Time appeared Mozilla thunderbird
CPEs cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*
cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:esr:*:*:*
Vendors & Products Mozilla thunderbird

Wed, 22 Apr 2026 12:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-125
References
Metrics threat_severity

None

threat_severity

Moderate


Wed, 22 Apr 2026 00:00:00 +0000

Type Values Removed Values Added
Description Incorrect boundary conditions in the Libraries component in NSS. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10. 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

Tue, 21 Apr 2026 17:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-754
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 21 Apr 2026 17:00:00 +0000

Type Values Removed Values Added
First Time appeared Mozilla
Mozilla firefox
Vendors & Products Mozilla
Mozilla firefox

Tue, 21 Apr 2026 13:15:00 +0000

Type Values Removed Values Added
Description Incorrect boundary conditions in the Libraries component in NSS. This vulnerability was fixed in Firefox 150 and Firefox ESR 140.10.
Title Incorrect boundary conditions in the Libraries component in NSS
References

cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published: 2026-04-21T12:40:59.634Z

Updated: 2026-04-21T23:34:59.578Z

Reserved: 2026-04-21T12:40:59.297Z

Link: CVE-2026-6766

cve-icon Vulnrichment

Updated: 2026-04-21T16:38:30.259Z

cve-icon NVD

Status : Analyzed

Published: 2026-04-21T13:16:22.493

Modified: 2026-04-22T14:57:46.330

Link: CVE-2026-6766

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-04-21T12:40:59Z

Links: CVE-2026-6766 - Bugzilla