MEDIUM

GHSA-mfx4-hv73-q22v

AIOHTTP: HTTP request smuggling via WebSocket upgrade

Quick fix

GHSA-mfx4-hv73-q22v — aiohttp: upgrade to the fixed version with the command below.

pip install --upgrade 'aiohttp>=3.14.2'

Details

### Summary

The HTTP parsers were vulnerable to a request smuggling attack relating to WebSocket upgrades.

### Impact

If using the server-side component, it may be possible for an attacker to execute a request smuggling vulnerability using an edge case in the WebSocket upgrade procedure. AIOHTT is unaware of any public exploit code.

---

Patch: https://github.com/aio-libs/aiohttp/commit/6ae358f0983c3f4d6f67692b2f8e65dc8e091c98

Are you affected?

Enter the version of the package you're using.

Affected packages

PyPI / aiohttp

Introduced in: 0 Fixed in: 3.14.2

Fix pip install --upgrade 'aiohttp>=3.14.2'

References

https://github.com/aio-libs/aiohttp/security/advisories/GHSA-mfx4-hv73-q22v [WEB]
https://github.com/aio-libs/aiohttp/pull/13017 [WEB]
https://github.com/aio-libs/aiohttp/commit/6ae358f0983c3f4d6f67692b2f8e65dc8e091c98 [WEB]
https://github.com/aio-libs/aiohttp [PACKAGE]
https://github.com/aio-libs/aiohttp/releases/tag/v3.14.2 [WEB]