---
id: CVE-2026-63450
title: >-
  Suricata is a network Intrusion Detection System, Intrusion Prevention System
  and Network Security Monitoring engine
summary: >-
  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
  negotiatio…
severity: low
cvss: 3.7
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N'
cwe:
  - CWE-755
vendor: OISF
product: suricata
affected:
  - suricata < 8.0.6
published: '2026-09-18'
updated: '2026-09-23'
sourceUpdated: '2026-09-23T20:17:12.723'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-63450'
references:
  - url: >-
      https://github.com/OISF/suricata/commit/52490b8c26909772801afed98df63a6d62f3af18
    label: security-advisories@github.com
  - url: >-
      https://github.com/OISF/suricata/commit/feb0ff91159cea474a983adf92e4b56fb16e4ffc
    label: security-advisories@github.com
  - url: 'https://github.com/OISF/suricata/pull/15704'
    label: security-advisories@github.com
  - url: 'https://github.com/OISF/suricata/releases/tag/suricata-8.0.6'
    label: security-advisories@github.com
  - url: 'https://github.com/OISF/suricata/security/advisories/GHSA-56wx-7hqh-wfgr'
    label: security-advisories@github.com
  - url: 'https://redmine.openinfosecfoundation.org/issues/8659'
    label: security-advisories@github.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-23T19:45:24.754319Z'
epss: 0.00378
epssPercentile: 0.29005
ingestedAt: '2026-09-18T20:51:25.799Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.