{"id":"CVE-2026-45770","title":"Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine","summary":"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…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","cwe":["CWE-693","CWE-787"],"vendor":"oisf","product":"suricata","affected":["suricata >= 8.0.0, < 8.0.5"],"patched":["suricata 8.0.5"],"published":"2026-09-10","updated":"2026-09-16","sourceUpdated":"2026-09-16T18:28:14.913","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-45770","references":[{"url":"https://forum.suricata.io/t/suricata-8-0-5-and-7-0-16-released/6315","label":"security-advisories@github.com"},{"url":"https://github.com/OISF/suricata/security/advisories/GHSA-653j-cc95-vj4c","label":"security-advisories@github.com"},{"url":"https://redmine.openinfosecfoundation.org/issues/8556","label":"security-advisories@github.com"}],"tags":["nvd","cve.org"],"epss":0.00339,"epssPercentile":0.27359,"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-09-11T14:36:27.298514Z"},"ingestedAt":"2026-09-11T18:53:56.462Z","slug":"CVE-2026-45770","body":"## Overview\n\nSuricata 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.\n\n## Affected\n\n- `suricata >= 8.0.0, < 8.0.5`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `suricata 8.0.5`","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}