{"id":"CVE-2026-63447","published":"2026-09-18T21:17:03.913","lastModified":"2026-09-23T18:12:04.247","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.","cvssScore":7.5,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwes":["CWE-407"],"vendors":[],"products":[],"references":[{"url":"https://github.com/OISF/suricata/commit/15bf91c5ccbbbf640cd042e1c96974b262549385","tags":[]},{"url":"https://github.com/OISF/suricata/commit/82c41905589305e8389ceb793907ccb74798aee5","tags":[]},{"url":"https://github.com/OISF/suricata/releases/tag/suricata-8.0.6","tags":[]},{"url":"https://github.com/OISF/suricata/security/advisories/GHSA-w394-3g33-3jg9","tags":[]},{"url":"https://redmine.openinfosecfoundation.org/issues/8592","tags":[]}],"exploitRefs":[{"url":"https://github.com/OISF/suricata/commit/15bf91c5ccbbbf640cd042e1c96974b262549385","tags":[]},{"url":"https://github.com/OISF/suricata/commit/82c41905589305e8389ceb793907ccb74798aee5","tags":[]},{"url":"https://github.com/OISF/suricata/releases/tag/suricata-8.0.6","tags":[]},{"url":"https://github.com/OISF/suricata/security/advisories/GHSA-w394-3g33-3jg9","tags":[]}],"hasPoc":true,"ai":null}