Vulnerability in Oisf Suricata
CVE-2026-63450
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.002 (16.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 16th percentile — 16.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Oisf Suricata — versions < 8.0.6
Weakness classification (CWE)
References
- github.com/OISF/suricata/security/advisories/GHSA-56wx-7hqh-wfgr (Vendor Advisory)
- github.com/OISF/suricata/pull/15704 (Patch)
- github.com/OISF/suricata/commit/52490b8c26909772801afed98df63a6d62f3af18 (Patch)
- github.com/OISF/suricata/commit/feb0ff91159cea474a983adf92e4b56fb16e4ffc (Patch)
- github.com/OISF/suricata/releases/tag/suricata-8.0.6 (Release Notes)
- redmine.openinfosecfoundation.org/issues/8659 (Permissions Required)
Frequently asked questions
- What is CVE-2026-63450?
- CVE-2026-63450 is a low-severity vulnerability in Oisf Suricata, classified under Improper Handling of Exceptional Conditions. CVSS score: 3.7/10. Published 2026-09-18.
- How severe is CVE-2026-63450?
- Low severity. CVSS v3 base score is 3.7 out of 10.