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Vulnerability · Published Sep 18, 2026 · Assigned by GitHub_M

CVE-2026-63450Suricata ftp: RETR/STOR before PORT/PASV can disable further IDS app-layer detection

Low 3.7

In plain English

A low-severity security flaw in suricata from OISF. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 16% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)3.7Low
Exploit odds (30 days)0.2%top 83.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

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 packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:13suricatano fix listedDEBIAN-CVE-2026-63450
Debian:14suricata1:8.0.6-1DEBIAN-CVE-2026-63450
Ubuntu:22.04:LTSsuricatano fix listedUBUNTU-CVE-2026-63450
Ubuntu:24.04:LTSsuricatano fix listedUBUNTU-CVE-2026-63450
Ubuntu:26.04:LTSsuricatano fix listedUBUNTU-CVE-2026-63450

Affected products (as reported)

VendorProductVersions
OISF suricata < 8.0.6

Weakness: CWE-755 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

References