HTTP Request Smuggling is not just a WAF bypass trick.Most people miss the real issue:The vulnerability comes from differences in how HTTP requests are parsed between:* reverse proxy (frontend)* backend serverCL.TE / TE.CL are only the basic cases. The deeper issues are more subtle:* HTTP/2 to HTTP/1.1 translation ambiguity* parsing inconsistencies across proxy chains* cache poisoning via request desynchronization* session hijacking without traditional auth or RCE bugsCore idea:One request can be interpreted as two different requests depending on which layer processes it.The exploit happens in that mismatch.It is not an application bug in the usual sense.It is a systemic parsing disagreement across the HTTP stack.#infosec #pentesting #websecurity #bugbounty