Suricata lua: excessive flow variable registration can bypass sandbox

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-45770
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-10 22:16:57 UTC
Updated2026-09-10 22:16:57 UTC
DescriptionSuricata 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.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from [email protected]

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

Problem Types: CWE-693 | CWE-787 | CWE-693 CWE-693: Protection Mechanism Failure | CWE-787 CWE-787: Out-of-bounds Write

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
3.1CNADECLARED7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA OISF Suricata affected >= 8.0.0, < 8.0.5 Not specified

References

ReferenceSourceLinkTags
forum.suricata.io/t/suricata-8-0-5-and-7-0-16-released/6315 [email protected] forum.suricata.io
redmine.openinfosecfoundation.org/issues/8556 [email protected] redmine.openinfosecfoundation.org
github.com/OISF/suricata/security/advisories/GHSA-653j-cc95-vj4c [email protected] github.com
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