AIOHTTP vulnerable to DoS through chunked messages

中 5.3CVE-2025-69229 · GHSA-g84x-mcqj-x9qq · PYSEC-2026-1106 · 06/01/2026 公開 · 11/10/2026 更新

要点

CVE-2025-69229 は aiohttp, aiohttp (aiohttp) に影響する深刻度「中」 (CVSS 5.3) の脆弱性です。
今後30日間に悪用される確率（EPSS）：0.40%（全脆弱性の 34.7% より高い）。
対処：3.13.3 以降に更新してください。

パッケージ	影響を受けるバージョン	修正済みバージョン
aiohttp PyPI	`< 3.13.3`	`3.13.3`
aiohttp aiohttp	`< 3.13.3`	`3.13.3`

概要

Summary

Handling of chunked messages can result in excessive blocking CPU usage when receiving a large number of chunks.

Impact

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.

Patch: https://github.com/aio-libs/aiohttp/commit/dc3170b56904bdf814228fae70a5501a42a6c712 Patch: https://github.com/aio-libs/aiohttp/commit/4ed97a4e46eaf61bd0f05063245f613469700229

NVD の説明

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.