DescriptionAn HTTP request smuggling vulnerability was found in aiohttp. Security-sensitive parts of the Python HTTP parser retained minor differences in allowable character sets that must trigger error handling to robustly match frame boundaries of proxies in order to protect against the injection of additional requests.An HTTP request smuggling vulnerability was found in aiohttp. Security-sensitive parts of the Python HTTP parser retained minor differences in allowable character sets that must trigger error handling to robustly match frame boundaries of proxies in order to protect against the injection of additional requests.