CVE-2024-52304: Aiohttp

High severity, CVSS 7.5. EPSS: 0.6% chance of exploitation in the next 30 days.

aiohttp is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.10.11, the Python parser parses newlines in chunk extensions incorrectly which can lead to request smuggling vulnerabilities under certain conditions. If a pure Python version of aiohttp is installed (i.e. without the usual C extensions) or `AIOHTTP_NO_EXTENSIONS` is enabled, then an attacker may be able to execute a request smuggling attack to bypass certain firewalls or proxy protections. Version 3.10.11 fixes the issue.

Affected products

• Aiohttp Aiohttp: before 3.10.11 (fixed in 3.10.11)

Published 2024-11-18. Last modified 2026-06-17.