AIOHTTP's unicode processing of header values could cause parsing discrepancies
### 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
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2025-69224US | medium6.5 | — | ||
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Versions 3.13.2 and below of the Python HTTP parser may allow a request smuggling attack with the pr… | ||||
references
External citations — patches, advisories, analysis.
- https://github.com/advisories/GHSA-69f9-5gxw-wvc2ADVISORY
- https://github.com/aio-libs/aiohttpPACKAGE
- https://github.com/aio-libs/aiohttp/commit/32677f2adfd907420c078dda6b79225c6f4ebce0FIX
- https://github.com/aio-libs/aiohttp/security/advisories/GHSA-69f9-5gxw-wvc2WEB
- https://nvd.nist.gov/vuln/detail/CVE-2025-69224ADVISORY
- https://pypi.org/project/aiohttpPACKAGE
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