CVE-2026-2781

critical

Description

Integer overflow in the Libraries component in NSS. This vulnerability affects Firefox < 148, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.

References

https://www.mozilla.org/security/advisories/mfsa2026-17/

https://www.mozilla.org/security/advisories/mfsa2026-16/

https://www.mozilla.org/security/advisories/mfsa2026-15/

https://www.mozilla.org/security/advisories/mfsa2026-13/

https://lists.debian.org/debian-lts-announce/2026/03/msg00012.html

https://bugzilla.mozilla.org/show_bug.cgi?id=2009552

Details

Source: Mitre, NVD

Published: 2026-02-24

Updated: 2026-03-25

Risk Information

CVSS v2

Base Score: 10

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

Severity: Critical

CVSS v3

Base Score: 9.8

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