---
cve: "CVE-2026-63446"
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: "2026-09-20T10:51:41+02:00"
---

# CVE-2026-63446

> 7.5 HIGH · 🧪 PoC

## Beschreibung

Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. From 8.0.0 until 8.0.6, AppLayerParserSetTransactionInspectId() in src/app-layer-parser.c uses an inverted guard and marks only already-inspected transactions as inspected. On flows passed by a pass rule or pass-the-flow exception policy, detection is skipped, so completed transactions remain unmarked, are never freed, and are repeatedly rescanned. The per-flow list can grow without bound with quadratic cleanup cost, causing CPU and memory exhaustion. 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)

- 4c28cc1b4ac64f48efdca6ce3e09748227a04a7e (Commit)

## Referenzen

- <https://github.com/OISF/suricata/security/advisories/GHSA-gjwr-75gq-877m>
- <https://github.com/OISF/suricata/pull/15726>
- <https://github.com/OISF/suricata/commit/006e21c1ccc38c1c815e7945d54b4638cc5f0de8>
- <https://github.com/OISF/suricata/commit/60a83c62a1dfdfb589b2bad27fb7fc339fc964b7>
- <https://github.com/OISF/suricata/releases/tag/suricata-8.0.6>
- <https://redmine.openinfosecfoundation.org/issues/8628>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-63446) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_