{"id":"CVE-2026-63450","state":"PUBLISHED","title":"Suricata ftp: RETR/STOR before PORT/PASV can disable further IDS app-layer detection","description":"Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to 8.0.6, the FTP parser in src/app-layer-ftp.c treats a RETR or STOR command sent before PORT or PASV negotiation as a fatal application-layer error instead of a recoverable protocol event. The fatal state disables FTP application-layer parsing for the remainder of the TCP flow, so later commands can evade parser-dependent rules and logging; IPS mode instead drops the flow. This issue is fixed in version 8.0.6.","publishedAt":"2026-09-18T20:13:42.549Z","updatedAt":"2026-09-23T19:45:34.656Z","severity":{"score":3.7,"label":"Low","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["OISF suricata"],"affected":[{"vendor":"OISF","product":"suricata","versions":[{"version":"< 8.0.6","status":"affected"}]}],"references":["https://github.com/OISF/suricata/security/advisories/GHSA-56wx-7hqh-wfgr","https://github.com/OISF/suricata/pull/15704","https://github.com/OISF/suricata/commit/52490b8c26909772801afed98df63a6d62f3af18","https://github.com/OISF/suricata/commit/feb0ff91159cea474a983adf92e4b56fb16e4ffc","https://github.com/OISF/suricata/releases/tag/suricata-8.0.6","https://redmine.openinfosecfoundation.org/issues/8659"],"weaknesses":["CWE-755"],"ingestedAt":"2026-10-29T20:12:41.951Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/63xxx/CVE-2026-63450.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-63450","state":"PUBLISHED","datePublished":"2026-09-18T20:13:42.549Z","dateUpdated":"2026-09-23T19:45:34.656Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-07-16T19:35:57.768Z"},"containers":{"cna":{"title":"Suricata ftp: RETR/STOR before PORT/PASV can disable further IDS app-layer detection","descriptions":[{"lang":"en","value":"Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to 8.0.6, the FTP parser in src/app-layer-ftp.c treats a RETR or STOR command sent before PORT or PASV negotiation as a fatal application-layer error instead of a recoverable protocol event. The fatal state disables FTP application-layer parsing for the remainder of the TCP flow, so later commands can evade parser-dependent rules and logging; IPS mode instead drops the flow. This issue is fixed in version 8.0.6."}],"affected":[{"vendor":"OISF","product":"suricata","versions":[{"version":"< 8.0.6","status":"affected"}]}],"references":[{"url":"https://github.com/OISF/suricata/security/advisories/GHSA-56wx-7hqh-wfgr","name":"https://github.com/OISF/suricata/security/advisories/GHSA-56wx-7hqh-wfgr","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/OISF/suricata/pull/15704","name":"https://github.com/OISF/suricata/pull/15704","tags":["x_refsource_MISC"]},{"url":"https://github.com/OISF/suricata/commit/52490b8c26909772801afed98df63a6d62f3af18","name":"https://github.com/OISF/suricata/commit/52490b8c26909772801afed98df63a6d62f3af18","tags":["x_refsource_MISC"]},{"url":"https://github.com/OISF/suricata/commit/feb0ff91159cea474a983adf92e4b56fb16e4ffc","name":"https://github.com/OISF/suricata/commit/feb0ff91159cea474a983adf92e4b56fb16e4ffc","tags":["x_refsource_MISC"]},{"url":"https://github.com/OISF/suricata/releases/tag/suricata-8.0.6","name":"https://github.com/OISF/suricata/releases/tag/suricata-8.0.6","tags":["x_refsource_MISC"]},{"url":"https://redmine.openinfosecfoundation.org/issues/8659","name":"https://redmine.openinfosecfoundation.org/issues/8659","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":3.7,"baseSeverity":"LOW","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-755","lang":"en","description":"CWE-755: Improper Handling of Exceptional Conditions","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-09-18T20:13:42.549Z"},"source":{"advisory":"GHSA-56wx-7hqh-wfgr","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-23T19:45:24.754319Z","id":"CVE-2026-63450","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-23T19:45:34.656Z"}}]}}}