---
cve: "CVE-2026-69243"
severity: "MEDIUM"
cvss: 6.3
epss: "28%"
vendor: "aio-libs"
kev: false
exploited: false
published: "2026-08-03 21:16:42"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-10T09:19:22+02:00"
---

# CVE-2026-69243

> 6.3 MEDIUM · 🧪 PoC

## Beschreibung

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.2, the HTTP parsers were vulnerable to a request smuggling attack relating to WebSocket upgrades. If using the server-side component, an attacker may be able to execute a request smuggling vulnerability using an edge case in the WebSocket upgrade procedure. A WebSocket upgrade request with a body could cause the parser to switch protocols before the complete request body was received, leaving trailing bytes to be handled as upgraded-protocol or pipelined data rather than normal HTTP body data. This issue is fixed in version 3.14.2.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- 6ae358f0983c3f4d6f67692b2f8e65dc8e091c98 (Commit)
- c1b9212ad3d93c24b5fc66ad0849597166bc816e (Commit)

## Referenzen

- <https://github.com/aio-libs/aiohttp/security/advisories/GHSA-mfx4-hv73-q22v>
- <https://github.com/aio-libs/aiohttp/pull/13017>
- <https://github.com/aio-libs/aiohttp/commit/6ae358f0983c3f4d6f67692b2f8e65dc8e091c98>
- <https://github.com/aio-libs/aiohttp/releases/tag/v3.14.2>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-69243) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_