CVE-2026-2781
CRITICAL severity · CVSS 9.8 · Integer overflow
9.8CVSS CRITICAL
Summary
Integer overflow in the Libraries component in NSS. This vulnerability was fixed in Firefox 148, Firefox ESR 140.8, Thunderbird 148, Thunderbird 140.8, and Firefox ESR 115.35.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)0%
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Additional information
- NVD record
- https://www.mozilla.org/security/advisories/mfsa2026-13/Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-15/Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-16/Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-17/Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=2009552
- https://www.mozilla.org/security/advisories/mfsa2026-31/
- https://lists.debian.org/debian-lts-announce/2026/03/msg00012.html