---
cve: "CVE-2026-50269"
severity: "LOW"
cvss: 2.7
epss: "30%"
vendor: "aio-libs"
kev: false
exploited: false
published: "2026-06-22 18:16:42"
tags: [cve, security, low]
source: tsecurity.de CVE-Dossier
exported: "2026-09-08T16:51:50+02:00"
---

# CVE-2026-50269

> 2.7 LOW · 🧪 PoC

## Beschreibung

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.0, attacker-controlled input included into multipart/payload headers can be used to modify a request to inject additional headers or similar. In the unlikely situation that an application is passing user-controlled strings into MultipartWriter.append(headers=...) or Payload.headers, then an attacker may be able to modify the request to inject headers or change the contents of the request. This vulnerability is fixed in 3.14.0.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- edb2724f481ba05ef889accc76bbe0089068e8eb (Commit)
- bf88077ebb14f4c29924b8e8904cba20c55c28b8 (Commit)

## Referenzen

- <https://github.com/aio-libs/aiohttp/security/advisories/GHSA-m6qw-4cw2-hm4m>
- <https://github.com/aio-libs/aiohttp/commit/bf88077ebb14f4c29924b8e8904cba20c55c28b8>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-50269) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_