CVE-2026-45770: Oisf Suricata

High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days.

Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Starting in version 8.0.0 and prior to version 8.0.5, a Lua rule that registers too many flow variables can corrupt Lua detection state and may bypass Suricata's restricted Lua sandbox. This requires an affected Lua script/rule to be loaded. Excessive flow variables being registered may also cause Suricata to crash. Version 8.0.5 contains a fix. As a workaround, disable `security.lua.allow-rules` unless Lua rules are required.

Affected products

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

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