AIOHTTP: Pure-Python parser request smuggling

影響: pip:aiohttp <= 3.14.3 → 3.14.4

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.

Read on GitHub Advisory Database

On 10/21/2026, 04:52 AM, GitHub Advisory Database published "AIOHTTP: Pure-Python parser request smuggling" (type: Advisory). Severity is "Medium" (medium). Related technologies: Python. CVE: CVE-2026-111750.