> For the complete documentation index, see [llms.txt](https://hacking-notes.jord4n.pro/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://hacking-notes.jord4n.pro/web/request-smuggling.md).
# HTTP Request Smuggling
HTTP request smuggling, CL.TE, TE.CL, HTTP/2 desync, front-end bypass, tunneling, and cache poisoning.
HTTP Request Smuggling notes for PortSwigger Web Security Academy labs, focused on practical testing steps, Burp Suite validation, payload behavior, and exploitation workflow.
## Testing Workflow
1. Identify the vulnerable feature and the relevant request, parameter, header, cookie, or browser-side sink.
2. Reproduce the behavior in Burp Suite with a minimal payload before escalating the attack.
3. Validate impact with a clear proof of concept, such as account access, data disclosure, code execution, SSRF, or state change.
4. Keep payloads, URLs, tokens, and lab credentials unchanged while documenting the exploitation path.
## Labs
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