CVE-2026-45764: Oisf Suricata

Critical severity, CVSS 9.1. EPSS: 0.6% chance of exploitation in the next 30 days.

Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to versions 7.0.16 and 8.0.5, a protocol change while processing HTTP/2 traffic could lead to type confusion in Suricata. Crafted traffic may cause Suricata to crash, resulting in denial of service. Versions 7.0.16 and 8.0.5 contain a fix. As a workaround, disable HTTP/2 parsing if it is not required.

Affected products

• Oisf Suricata: from 7.0.0, before 7.0.16 (fixed in 7.0.16); from 8.0.0, before 8.0.5 (fixed in 8.0.5)

Published 2026-09-10. Last modified 2026-09-16.