CVE-2026-63450 — Suricata ftp: RETR/STOR before PORT/PASV can disable further IDS app-layer detection
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 treat…
Published: 2026-09-18 · CVSS: 3.7 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7