CVE-2025-69225
Medium
Description
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Versions 3.13.2 and below contain parser logic which allows non-ASCII decimals to be present in the Range header. There is no known impact, but there is the possibility that there's a method to exploit a request smuggling vulnerability. This issue is fixed in version 3.13.3.
SeverityMedium
CVSS5.3
Exploit probability—
ProductAiohttp
PublishedJan 6, 2026
First seenJan 6, 2026
Weakness typeCWE-444CWE-444
How to fix
Update
- aiohttp aiohttp3.13.3 or later
- aiohttp3.13.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| aiohttp aiohttp | v < 3.13.3 | 3.13.3 |
| aiohttpPyPI | v < 3.13.3 | 3.13.3 |
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