AIOHTTP Affected by Denial of Service (DoS) via Unbounded DNS Cache in TCPConnector

높음 7.5CVE-2026-34513 · GHSA-hcc4-c3v8-rx92 · PYSEC-2026-2095 · Published 01/04/2026 · updated 25/10/2026

요약

CVE-2026-34513은(는) aiohttp, aiohttp (aiohttp)에 영향을 주는 높음 (CVSS 7.5) 취약점입니다.
향후 30일 내 악용 확률(EPSS): 0.46%, 전체 취약점의 39.7%보다 높음.
조치: 3.13.4 이상으로 업데이트하세요.

Package	Affected versions	Patched versions
aiohttp PyPI	`< 3.13.4`	`3.13.4`
aiohttp aiohttp	`< 3.13.4`	`3.13.4`

Description

Summary

An unbounded DNS cache could result in excessive memory usage possibly resulting in a DoS situation.

Impact

If an application makes requests to a very large number of hosts, this could cause the DNS cache to continue growing and slowly use excessive amounts of memory.

Patch: https://github.com/aio-libs/aiohttp/commit/c4d77c3533122be353b8afca8e8675e3b4cbda98

NVD description

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, an unbounded DNS cache could result in excessive memory usage possibly resulting in a DoS situation. This issue has been patched in version 3.13.4.

References

aio-libs/aiohttp security advisory · WEB
nvd.nist.gov/vuln/detail/CVE-2026-34513 · ADVISORY
aio-libs/aiohttp commit c4d77c3 · WEB
aio-libs/aiohttp · PACKAGE
aio-libs/aiohttp release v3.13.4 · WEB

aiohttp의 다른 취약점

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Package

Affected versions

Patched versions

aiohttp

PyPI

< 3.13.4

3.13.4

aiohttp

< 3.13.4

3.13.4

Description

Summary

An unbounded DNS cache could result in excessive memory usage possibly resulting in a DoS situation.

Impact

If an application makes requests to a very large number of hosts, this could cause the DNS cache to continue growing and slowly use excessive amounts of memory.

Patch: https://github.com/aio-libs/aiohttp/commit/c4d77c3533122be353b8afca8e8675e3b4cbda98

NVD description

aiohttp의 다른 취약점

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