CVE-2026-6772

Incorrect boundary conditions in the Libraries component in NSS

CVSS 7.5 HIGHEPSS 0.3%CWE-754

Vexday Risk Score

21Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 7.5EPSS 0.3%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

21 Apr 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

Incorrect boundary conditions in the Libraries component in NSS. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.

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

Affected products

Mozilla · Firefox Mozilla · Thunderbird

Want to know if your infrastructure is exposed to this?

Talk to TrueHacking →

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2026089 https://www.mozilla.org/security/advisories/mfsa2026-30/https://www.mozilla.org/security/advisories/mfsa2026-31/https://www.mozilla.org/security/advisories/mfsa2026-32/https://www.mozilla.org/security/advisories/mfsa2026-33/https://www.mozilla.org/security/advisories/mfsa2026-34/