Suricata ftp: RETR/STOR before PORT/PASV can disable further IDS app-layer detection
cve-program · CVE-2026-63450
PublishedSuricata 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 advisoryAffected versions, risk and source history
Related advisories and sources
Publishers link these advisories through the identifiers shown below. A shared identifier or date alone does not tell you whether your software is affected or whether the advisories describe the same cause.
CVE-2026-63450 · CVE overview and exploitation status
cve-program · CVE-2026-63450
- https://github.com/OISF/suricata/security/advisories/GHSA-56wx-7hqh-wfgr
- https://github.com/OISF/suricata/pull/15704
- https://github.com/OISF/suricata/commit/52490b8c26909772801afed98df63a6d62f3af18
- https://github.com/OISF/suricata/commit/feb0ff91159cea474a983adf92e4b56fb16e4ffc
- https://github.com/OISF/suricata/releases/tag/suricata-8.0.6
- https://redmine.openinfosecfoundation.org/issues/8659
Related changes
Linked by CVE identifierNo related changes are available here.