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CVE-2026-63450

Suricata ftp: RETR/STOR before PORT/PASV can disable further IDS app-layer detection

CVSS 3.1 3.7 LOWCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-63450

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-63450

Published

suricata

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "OISF",
                    "product": "suricata",
                    "versions": [
                        {
                            "version": "< 8.0.6",
                            "status": "affected"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON