{"id":"CVE-2026-63447","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-63447","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…","details":"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.","published":"2026-09-18T21:17:03.913","modified":"2026-09-18T21:17:03.913","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":{"url":"https://github.com/OISF/suricata/commit/15bf91c5ccbbbf640cd042e1c96974b262549385","label":"OISF/suricata@15bf91c"},"references":[{"type":"WEB","url":"https://github.com/OISF/suricata/commit/15bf91c5ccbbbf640cd042e1c96974b262549385"},{"type":"WEB","url":"https://github.com/OISF/suricata/commit/82c41905589305e8389ceb793907ccb74798aee5"},{"type":"WEB","url":"https://github.com/OISF/suricata/releases/tag/suricata-8.0.6"},{"type":"WEB","url":"https://github.com/OISF/suricata/security/advisories/GHSA-w394-3g33-3jg9"},{"type":"WEB","url":"https://redmine.openinfosecfoundation.org/issues/8592"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-09-18T21:17:03.913"}}