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Vulnerability IntelligenceCVE-2026-6766

CVE-2026-6766

HIGH7.5

Incorrect boundary conditions in the Libraries component in NSS

Published Apr 21, 2026

Modified 6 days ago

Details

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

https://bugzilla.mozilla.org/show_bug.cgi?id=2023207

https://www.cve.org/CVERecord?id=CVE-2026-6766

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

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

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

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

CVSS Analysis

CVSS v3.1

7.5

Exploitability

Attack Vector

NetworkAV:N

Attack Complexity

LowAC:L

Privileges Required

NonePR:N

User Interaction

NoneUI:N

Scope

Scope

UnchangedS:U

Impact

Confidentiality

HighC:H

Integrity

NoneI:N

Availability

NoneA:N

7.5/CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Ecosystems

Timeline

PublishedApr 21, 2026

ModifiedApr 21, 2026

CVE-2026-6766 | Mondoo Vulnerability Intelligence