CVE-2026-63447

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Source
https://cve.org/CVERecord?id=CVE-2026-63447
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-63447.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-63447
Aliases
  • GHSA-w394-3g33-3jg9
Downstream
Published
2026-09-18T20:21:06Z
Modified
2026-09-19T11:45:30Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
Suricata ftp: crafted FTP traffic can cause quadratic CPU consumption
Details

Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. From 8.0.5 until 8.0.6, the FTP parser in src/app-layer-ftp.c can continue allocating transactions after app-layer.protocols.ftp.max-tx is reached while processing one large chunk of FTP command data. The oversized transaction list is repeatedly processed with quadratic complexity after the too_many_transactions event, allowing crafted FTP traffic to degrade packet processing, reduce monitoring visibility, or cause denial of service. This issue is fixed in version 8.0.6.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-407"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63447.json"
}
References

Affected packages

Git / github.com/oisf/suricata

Affected ranges

Type
GIT
Repo
https://github.com/oisf/suricata
Events
Introduced
5611b60c6172fe4204cd69a9c9d466b6632dd0c7
Fixed
4c28cc1b4ac64f48efdca6ce3e09748227a04a7e
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "8.0.5"
        },
        {
            "fixed": "8.0.6"
        }
    ],
    "source": "AFFECTED_FIELD"
}

Affected versions

suricata-8.*
suricata-8.0.5

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-63447.json"