---
cve: "CVE-2023-54397"
severity: "CRITICAL"
cvss: 9.0
epss: "0.4%"
vendor: "tornadoweb"
kev: false
exploited: false
published: "2026-09-15 16:17:05"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-21T12:17:20+02:00"
---

# CVE-2023-54397

> 9.0 CRITICAL · 🧪 PoC

## Beschreibung

Tornado before 6.3.3 contains an HTTP request smuggling vulnerability due to improper parsing of Content-Length headers accepting non-standard characters. Attackers can send crafted HTTP requests with these characters to bypass proxy validation and smuggle requests when deployed behind certain proxies.

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:H/VA:N/SC:L/SI:H/SA:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Hoch | good |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- e4d698433b44f350d4908da9ca2cac475c92dfdc (Commit)

## Referenzen

- <https://github.com/tornadoweb/tornado/security/advisories/GHSA-qppv-j76h-2rpx>
- <https://www.vulncheck.com/advisories/tornado-before-6.3.3-http-request-smuggling-via-content-length>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2023-54397) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_