aio-libs/aiohttp · Security
AIOHTTP: Pure-Python parser request smuggling
- GHSA ID
- GHSA-pqxq-w44r-73xw
- CVE ID
- CVE-2026-111750
- Severity
- medium
- Published
- Updated
- CVSS v4
- 6.3 · CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:L/SA:L
Description
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.
CWEs
- CWE-444 · Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
References
- https://github.com/aio-libs/aiohttp/security/advisories/GHSA-pqxq-w44r-73xw ↗
- https://nvd.nist.gov/vuln/detail/CVE-2026-111750 ↗
- https://github.com/aio-libs/aiohttp/commit/9b27347e61454d9f8ca2055f4c67a37dee336e83 ↗
- https://github.com/aio-libs/aiohttp/releases/tag/v3.14.4 ↗
- https://github.com/advisories/GHSA-pqxq-w44r-73xw ↗