The Problem When malformed or abnormal HTTP requests are interpreted by one or more entities in the data flow between the user and the web server, such as a proxy or firewall, they can be interpreted inconsistently, allowing the attacker to "smuggle" a request to one device without the other devi...
Source: [Dev.to](https://dev.to/aniket28dot/mitigating-http-request-smuggling-be6)