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PYSEC-2026-2094

Quick fix

PYSEC-2026-2094 — 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, insufficient restrictions in header/trailer handling could cause uncapped memory usage. 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/0c2e9da51126238a421568eb7c5b53e5b5d17b36[FIX]
https://github.com/aio-libs/aiohttp/security/advisories/GHSA-w2fm-2cpv-w7v5[FIX]