GitHub Advisoryadvisory · PyPI

GHSA-mfx4-hv73-q22v AIOHTTP: HTTP request smuggling via WebSocket upgrade

MEDIUM Published 2026-08-03 Modified 2026-08-03 Official page ↗
Aliases
CVE-2026-69243
Ecosystem
PyPI
Packages
aiohttp
Severity
Moderate
CVSS vector
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
Weaknesses
CWE-444
Reviewed
2026-08-03

Affected packages

• PyPI aiohttp: < 3.14.2 → fixed in 3.14.2

Description

Summary The HTTP parsers were vulnerable to a request smuggling attack relating to WebSocket upgrades. Impact If using the server-side component, it may be possible for an attacker to execute a request smuggling vulnerability using an edge case in the WebSocket upgrade procedure. AIOHTT is unaware of any public exploit code. --- Patch: https://github.com/aio-libs/aiohttp/commit/6ae358f0983c3f4d6f67692b2f8e65dc8e091c98

Related

Alias · CVE (1)

  • CVE-2026-69243 AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. vulnerability

Weakness · CWE (1)

  • CWE-444 Inconsistent Interpretation of HTTP Requests weakness

References