OISF Suricata up to 8.0.4 Lua Rule Engine security.lua sandbox

Summaryinfo

A vulnerability has been found in OISF Suricata up to 8.0.4 and classified as very critical. This impacts an unknown function of the file security.lua of the component Lua Rule Engine. Performing a manipulation results in sandbox. This vulnerability is cataloged as CVE-2026-45770. It is possible to initiate the attack remotely. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in OISF Suricata up to 8.0.4. It has been classified as very critical. This affects an unknown part of the file security.lua of the component Lua Rule Engine. The manipulation with an unknown input leads to a sandbox vulnerability. CWE is classifying the issue as CWE-265. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-45770 since 05/13/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. Additional levels of successful authentication are needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/11/2026). The attack technique deployed by this issue is T1611 according to MITRE ATT&CK.

Upgrading to version 8.0.5 eliminates this vulnerability.

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Productinfo

Vendor

• OISF

Name

• Suricata

Version

• 8.0.0
• 8.0.1
• 8.0.2
• 8.0.3
• 8.0.4

License

• open-source

Website

• Product: https://github.com/OISF/suricata/

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