{"id":"CVE-2026-63451","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-63451","generatedAt":"2026-10-27T23:52:02.143Z","title":"Loading the crafted rule, including in test mode, can trigger a heap buffer overflow and crash Suricata; network traffic alone cannot reach the flaw.","description":"Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. From 8.0.0 until 8.0.6, a locally supplied detection rule that combines frame inspection without content and a transformed match without content can make src/detect-engine-prefilter.c select multiple non-prefilter frame engines while preparing signatures for non-prefilter inspection. Loading the crafted rule, including in test mode, can trigger a heap buffer overflow and crash Suricata; network traffic alone cannot reach the flaw. This issue is fixed in version 8.0.6.","published":"2026-09-18T21:17:05.000Z","lastModified":"2026-09-28T18:33:00.000Z","status":"Analyzed","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":5.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-122"],"affected":["oisf/suricata"],"epss":{"score":0.00149,"percentile":0.04084,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.15%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"scored","label":"Newly scored","at":"2026-09-28T20:00:05.000Z","detail":{"from":"3.3","score":"5.5","severity":"MEDIUM","fromSeverity":"LOW"},"summary":"Now scored CVSS 5.5 MEDIUM (was 3.3)."}],"references":[{"url":"https://github.com/OISF/suricata/commit/5449ae170bfce213907d9bab87143a59774ed48f","tags":["Patch"],"source":"security-advisories@github.com"},{"url":"https://github.com/OISF/suricata/commit/d62acf5d75a61b76b16815e773408852f41b1975","tags":["Patch"],"source":"security-advisories@github.com"},{"url":"https://github.com/OISF/suricata/pull/15807","tags":["Patch"],"source":"security-advisories@github.com"},{"url":"https://github.com/OISF/suricata/releases/tag/suricata-8.0.6","tags":["Release Notes"],"source":"security-advisories@github.com"},{"url":"https://github.com/OISF/suricata/security/advisories/GHSA-6qwq-j83r-qp34","tags":["Mitigation","Vendor Advisory"],"source":"security-advisories@github.com"},{"url":"https://redmine.openinfosecfoundation.org/issues/8590","tags":["Permissions Required"],"source":"security-advisories@github.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-63451","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}