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.

INFO

Published Date :

2026-01-05T23:37:52.955Z

Last Modified :

2026-01-06T19:02:09.630Z

Source :

GitHub_M
AFFECTED PRODUCTS

The following products are affected by CVE-2025-69229 vulnerability.

Vendors Products
Aio-libs
  • Aiohttp Session
Aio-libs Project
  • Aiohttp
Aiohttp
  • Aio-libs
  • Aiohttp

CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Attack Requirements
Privileges Required
User Interaction
VS Confidentiality
VS Integrity
VS Availability
SS Confidentiality
SS Integrity
SS Availability
Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact