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6.3 Medium

CVE-2025-69224 AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python

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.

Affected products and versions

Product Affected versions Fixed in
aiohttp 3.13 earliest → < 3.13.3 3.13.3

References

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