HIGH7.5

PYSEC-2026-2095

Quick fix

PYSEC-2026-2095 — aiohttp: upgrade to the fixed version with the command below.

pip install --upgrade 'aiohttp>=3.13.4'

Details

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.

Are you affected?

Enter the version of the package you're using.

Affected packages

PyPI/aiohttp

Introduced in: 0Fixed in: 3.13.4

Fixpip install --upgrade 'aiohttp>=3.13.4'

References

https://github.com/aio-libs/aiohttp/releases/tag/v3.13.4[ADVISORY]
https://github.com/aio-libs/aiohttp/commit/c4d77c3533122be353b8afca8e8675e3b4cbda98[FIX]
https://github.com/aio-libs/aiohttp/security/advisories/GHSA-hcc4-c3v8-rx92[FIX]