by Kastro
Paper/Archive/CVE-2026-2781

CVE-2026-2781

Mozilla Firefox — Integer overflow in the Libraries component in NSS

EPSS 0.4%CVSS 9.8
critical.is priorityof 100
37
CVSS 9.8 (NVD)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 37.6.376 × 207.5No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
Firefoxsee advisory115.35CNA
Thunderbirdsee advisory140.8CNA

Scores by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADP8.8CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

refbugzilla.mozilla.org/show_bug.cgi?id=2009552refmozilla.org/security/advisories/mfsa2026-13refmozilla.org/security/advisories/mfsa2026-15refmozilla.org/security/advisories/mfsa2026-16refmozilla.org/security/advisories/mfsa2026-17refmozilla.org/security/advisories/mfsa2026-31reflists.debian.org/debian-lts-announce/2026/03/msg00012.html