{"id":"CVE-2026-45761","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. Prior to versions 7.0.16 and 8.0.5, a crafted rule using mixed-case frame syntax could trigger a heap buffer overflow w…","severity":"low","cvss":3.3,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L","cwe":["CWE-122"],"vendor":"oisf","product":"suricata","affected":["suricata >= 7.0.0, < 7.0.16","suricata >= 8.0.0, < 8.0.5"],"patched":["suricata 8.0.5"],"published":"2026-09-10","updated":"2026-09-16","sourceUpdated":"2026-09-16T20:17:47.337","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-45761","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-r74x-74x5-r9vm","label":"security-advisories@github.com"},{"url":"https://redmine.openinfosecfoundation.org/issues/8526","label":"security-advisories@github.com"}],"tags":["nvd","cve.org"],"epss":0.00138,"epssPercentile":0.03548,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-15T15:01:49.482498Z"},"ingestedAt":"2026-09-12T17:26:42.911Z","slug":"CVE-2026-45761","body":"## Overview\n\nSuricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to versions 7.0.16 and 8.0.5, a crafted rule using mixed-case frame syntax could trigger a heap buffer overflow while Suricata is loading signatures. The issue is reached during rule parsing/loading rather than by network traffic alone. Versions 7.0.16 and 8.0.5 contain a fix. As a workaround, preprocess rules to check that frames are all lowercase and/or only load trusted rulesets.\n\n## Affected\n\n- `suricata >= 7.0.0, < 7.0.16`\n- `suricata >= 8.0.0, < 8.0.5`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `suricata 8.0.5`","depth":"sunlit","depthScore":18,"depthScoreParts":{"impact":18.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}