CVE-2025-69229
Published: Jan 5, 2026
Modified: Jan 6, 2026
Description
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. In versions 3.13.2 and below, handling of chunked messages can result in excessive blocking CPU usage when receiving a large number of chunks. If an application makes use of the request.read() method in an endpoint, it may be possible for an attacker to cause the server to spend a moderate amount of blocking CPU time (e.g. 1 second) while processing the request. This could potentially lead to DoS as the server would be unable to handle other requests during that time. This issue is fixed in version 3.13.3.
| Vendor | Product | Versions |
|---|---|---|
aio-libs | aiohttp | affected < 3.13.3 |
Weaknesses (CWE)
References
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