{"id":"CVE-2026-63447","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. From 8.0.5 until 8.0.6, the FTP parser in src/app-layer-ftp.c can continue allocating transactions after app-layer.prot…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-407"],"vendor":"OISF","product":"suricata","affected":["suricata >= 8.0.5, < 8.0.6"],"published":"2026-09-18","updated":"2026-09-21","sourceUpdated":"2026-09-21T19:17:08.697","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-63447","references":[{"url":"https://github.com/OISF/suricata/commit/15bf91c5ccbbbf640cd042e1c96974b262549385","label":"security-advisories@github.com"},{"url":"https://github.com/OISF/suricata/commit/82c41905589305e8389ceb793907ccb74798aee5","label":"security-advisories@github.com"},{"url":"https://github.com/OISF/suricata/releases/tag/suricata-8.0.6","label":"security-advisories@github.com"},{"url":"https://github.com/OISF/suricata/security/advisories/GHSA-w394-3g33-3jg9","label":"security-advisories@github.com"},{"url":"https://redmine.openinfosecfoundation.org/issues/8592","label":"security-advisories@github.com"}],"tags":["nvd","cve.org"],"epss":0.00361,"epssPercentile":0.29823,"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-09-21T18:21:07.869708Z"},"ingestedAt":"2026-09-18T20:51:25.795Z","slug":"CVE-2026-63447","body":"## Overview\n\nSuricata 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}