CVE-2025-69224 – AIOHTTP’s Unicode processing of header values could cause parsing discrepancies

CVE ID : CVE-2025-69224

Published : Jan. 5, 2026, 11:15 p.m. | 1 hour, 11 minutes ago

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.

Severity: 6.3 | MEDIUM

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