In short
- CVE-2025-69224 is a MEDIUM (CVSS 6.5) vulnerability affecting aiohttp, aiohttp (aiohttp).
- Chance of exploitation in the next 30 days (EPSS): 0.25%, higher than 16.4% of all vulnerabilities.
- Fix: update to 3.13.3 or later.
| Package | Affected versions | Patched versions |
|---|
| aiohttp PyPI | < 3.13.3
| 3.13.3
|
| aiohttp | < 3.13.3
| 3.13.3
|
Description
Summary
The Python HTTP parser may allow a request smuggling attack with the presence of non-ASCII characters.
Impact
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.
Patch: https://github.com/aio-libs/aiohttp/commit/32677f2adfd907420c078dda6b79225c6f4ebce0
NVD 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.
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