Description
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Versions 3.13.2 and below of the Python HTTP parser may allow a request smuggling attack with the presence of non-ASCII characters. 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. This issue is fixed in version 3.13.3.
References
https://github.com/aio-libs/aiohttp/security/advisories/GHSA-69f9-5gxw-wvc2
CVSS impact metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
6.5 · Medium
Information
Source identifier
Vulnerability status
Analyzed
Published
2026-01-05T23:15:40.697Z
1 week agoLast modified
2026-01-14T19:12:27.570Z
1 hour ago