CVE-2026-63450: Oisf Suricata

Medium severity, CVSS 5.3. EPSS: 0.2% chance of exploitation in the next 30 days.

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.

Affected products

• Oisf Suricata: before 8.0.6 (fixed in 8.0.6)

Published 2026-09-18. Last modified 2026-09-28.