CVE-2026-45770
Publication date 14 September 2026
Last updated 14 September 2026
Ubuntu priority
Description
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.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| suricata | 26.04 LTS resolute |
Needs evaluation
|
| 24.04 LTS noble |
Needs evaluation
|
|
| 22.04 LTS jammy |
Needs evaluation
|
|
| 18.04 LTS bionic |
Needs evaluation
|
|
| 16.04 LTS xenial |
Needs evaluation
|
Severity score breakdown
CVSS version: CVSS v3.0
Base score
7.5 · High
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
References
Other references
- https://www.cve.org/CVERecord?id=CVE-2026-45770
- https://github.com/OISF/suricata/security/advisories/GHSA-653j-cc95-vj4c
- https://redmine.openinfosecfoundation.org/issues/8557 (suricata-8.0.5)
- https://github.com/OISF/suricata/commit/09c45d91a565642dffefeb87c7b54c4e3224db73 (suricata-8.0.5)
- https://forum.suricata.io/t/suricata-8-0-5-and-7-0-16-released/6315
- https://redmine.openinfosecfoundation.org/issues/8556