QwikSec

Security Database

CVE

CWE

Training

CVE-2026-2781

Published: Feb 24, 2026

Modified: Apr 21, 2026

PUBLISHED

Description

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.

Vendor	Product	Versions
Mozilla	Firefox	unaffected `115.35 - <= 115.` unaffected `140.8 - <= 140.` unaffected `148 - <= *`
Mozilla	Thunderbird	unaffected `140.8 - <= 140.` unaffected `148 - <= `

References

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

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

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

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

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

https://www.mozilla.org/security/advisories/mfsa2026-31/

Security Training

Train your team to recognize and prevent security threats with our comprehensive security awareness program.

Vulnerability Scanning

Discover vulnerabilities in your applications and infrastructure before attackers do.