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.
A flaw was found in the aiohttp package. 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, for example, without the usual C extensions, or `AIOHTTP_NO_EXTENSIONS` is enabled, an attacker may be able to execute a request smuggling attack to bypass certain firewalls or proxy protections.
Multiple security vulnerabilities were discovered in python-aiohttp, a HTTP client/server for asyncio, which could result in denial of service, directory traversal, CRLF injection or request smuggling.
