---
cve: "CVE-2026-63447"
severity: "HIGH"
cvss: 7.5
epss: "0.4%"
vendor: "OISF"
kev: false
exploited: false
published: "2026-09-18 21:17:03"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-22T22:34:29+02:00"
---

# CVE-2026-63447

> 7.5 HIGH · 🧪 PoC

## Beschreibung

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.

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Keine | good |
| I Integrität | Keine | good |
| A Verfügbarkeit | Hoch | bad |

## Patch verfügbar (OSV)

- 15bf91c5ccbbbf640cd042e1c96974b262549385 (Commit)
- 82c41905589305e8389ceb793907ccb74798aee5 (Commit)

## Referenzen

- <https://github.com/OISF/suricata/security/advisories/GHSA-w394-3g33-3jg9>
- <https://github.com/OISF/suricata/commit/15bf91c5ccbbbf640cd042e1c96974b262549385>
- <https://github.com/OISF/suricata/commit/82c41905589305e8389ceb793907ccb74798aee5>
- <https://github.com/OISF/suricata/releases/tag/suricata-8.0.6>
- <https://redmine.openinfosecfoundation.org/issues/8592>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-63447) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_