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GHSA-69f9-5gxw-wvc2

AIOHTTP's unicode processing of header values could cause parsing discrepancies

Source: GitHub Advisory Database (reviewed) Low CVE-2025-69224

Packages

EcosystemPackageAffectedFixed in
PyPI aiohttp < 3.13.3 3.13.3

Details

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

### Summary The Python HTTP parser may allow a request smuggling attack with the presence of non-ASCII characters. ### Impact If a pure Python version of aiohttp is installed (i.e. without the usual C extensions) or AIOHTTP_NO_EXTENSIONS is enabled, then an attacker may be able to execute a request smuggling attack to bypass certain firewalls or proxy protections. ------ Patch: https://github.com/aio-libs/aiohttp/commit/32677f2adfd907420c078dda6b79225c6f4ebce0

References

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