GHSA-pqxq-w44r-73xw

AIOHTTP: Pure-Python parser request smuggling

Source: GitHub Advisory Database (reviewed) Moderate CVE-2026-111750

Packages

Ecosystem	Package	Affected	Fixed in
PyPI	aiohttp	< 3.14.4	3.14.4

Details

As written in the advisory (Markdown source, shown as plain text).

### Summary The pure Python parser is vulnerable to an HTTP request smuggling attack. ### Impact If users are using the Python parser (`AIOHTTP_NO_EXTENSIONS`, or not a standard wheel installed), then an application may be vulnerable to a request smuggling attack. ### Workaround Switch to the default C parser.

References

External links from the advisory. They lead to third-party sites.

https://github.com/aio-libs/aiohttp/security/advisories/GHSA-pqxq-w44r-73xw web
https://nvd.nist.gov/vuln/detail/CVE-2026-111750 advisory
https://github.com/aio-libs/aiohttp/commit/9b27347e61454d9f8ca2055f4c67a37dee336e83 web
https://github.com/aio-libs/aiohttp package
https://github.com/aio-libs/aiohttp/releases/tag/v3.14.4 web