{"id":"CVE-2026-63447","state":"PUBLISHED","title":"Suricata ftp: crafted FTP traffic can cause quadratic CPU consumption","description":"Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. From 8.0.5 until 8.0.6, the FTP parser in src/app-layer-ftp.c can continue allocating transactions after app-layer.protocols.ftp.max-tx is reached while processing one large chunk of FTP command data. The oversized transaction list is repeatedly processed with quadratic complexity after the too_many_transactions event, allowing crafted FTP traffic to degrade packet processing, reduce monitoring visibility, or cause denial of service. This issue is fixed in version 8.0.6.","publishedAt":"2026-09-18T20:21:06.510Z","updatedAt":"2026-09-21T18:21:33.801Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["OISF suricata"],"affected":[{"vendor":"OISF","product":"suricata","versions":[{"version":">= 8.0.5, < 8.0.6","status":"affected"}]}],"references":["https://github.com/OISF/suricata/security/advisories/GHSA-w394-3g33-3jg9","https://github.com/OISF/suricata/commit/15bf91c5ccbbbf640cd042e1c96974b262549385","https://github.com/OISF/suricata/commit/82c41905589305e8389ceb793907ccb74798aee5","https://github.com/OISF/suricata/releases/tag/suricata-8.0.6","https://redmine.openinfosecfoundation.org/issues/8592"],"weaknesses":["CWE-407"],"ingestedAt":"2026-10-29T20:12:41.951Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/63xxx/CVE-2026-63447.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-63447","state":"PUBLISHED","datePublished":"2026-09-18T20:21:06.510Z","dateUpdated":"2026-09-21T18:21:33.801Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-07-16T19:35:57.767Z"},"containers":{"cna":{"title":"Suricata ftp: crafted FTP traffic can cause quadratic CPU consumption","descriptions":[{"lang":"en","value":"Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. From 8.0.5 until 8.0.6, the FTP parser in src/app-layer-ftp.c can continue allocating transactions after app-layer.protocols.ftp.max-tx is reached while processing one large chunk of FTP command data. The oversized transaction list is repeatedly processed with quadratic complexity after the too_many_transactions event, allowing crafted FTP traffic to degrade packet processing, reduce monitoring visibility, or cause denial of service. This issue is fixed in version 8.0.6."}],"affected":[{"vendor":"OISF","product":"suricata","versions":[{"version":">= 8.0.5, < 8.0.6","status":"affected"}]}],"references":[{"url":"https://github.com/OISF/suricata/security/advisories/GHSA-w394-3g33-3jg9","name":"https://github.com/OISF/suricata/security/advisories/GHSA-w394-3g33-3jg9","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/OISF/suricata/commit/15bf91c5ccbbbf640cd042e1c96974b262549385","name":"https://github.com/OISF/suricata/commit/15bf91c5ccbbbf640cd042e1c96974b262549385","tags":["x_refsource_MISC"]},{"url":"https://github.com/OISF/suricata/commit/82c41905589305e8389ceb793907ccb74798aee5","name":"https://github.com/OISF/suricata/commit/82c41905589305e8389ceb793907ccb74798aee5","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/8592","name":"https://redmine.openinfosecfoundation.org/issues/8592","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-407","lang":"en","description":"CWE-407: Inefficient Algorithmic Complexity","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-09-18T20:21:06.510Z"},"source":{"advisory":"GHSA-w394-3g33-3jg9","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-21T18:21:07.869708Z","id":"CVE-2026-63447","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-21T18:21:33.801Z"}}]}}}