defparam/smuggler
Smuggler - An HTTP Request Smuggling / Desync testing tool written in Python 3 observed · 2026-08-28
Health v2 · maintenance only
32/100
- Activity 0
- Release rhythm 35
- Longevity 100
Flags: no_releases
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-03. Adoption (stars, forks) is never an input.
- gap_med: n/a
- age_days: 2277
- days_rel: n/a
- days_push: 974
- n_releases_24m: 0
Adoption not part of the score
2093 stars · 326 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded
Smuggler is a Python 3 command-line tool that tests web servers and proxies for HTTP request smuggling and desync vulnerabilities. It fires a battery of mutated HTTP requests at a target URL or a piped list of hosts and flags responses that indicate potential front-end/back-end desync issues.
Use cases
- test a website for http request smuggling vulnerabilities
- check if my reverse proxy or load balancer is vulnerable to http desync
- scan a list of hosts for cl.te and te.cl desync issues
- find request smuggling bugs in bug bounty targets
- detect front-end/back-end http header parsing mismatches
- audit cdn or api gateway endpoints for desync before deployment
When to choose
- you need a quick, scriptable CLI check for HTTP request smuggling on one URL or thousands of piped hosts
- you are doing a pentest or bug bounty engagement and want Kettle-style desync mutations out of the box
- you want customizable payload sets via a config file, virtual host support, and logging of findings
- you need a lightweight Python 3 tool with no heavy dependencies
When to avoid
- you need a general-purpose web vulnerability scanner covering SQLi, XSS, etc. - smuggler only targets desync
- you require guaranteed accuracy - the author explicitly warns of false positives on large providers like AWS, Akamai, and Google
- you need a passive scanner - it actively sends malformed requests and can affect targets
- you lack authorization to test the target, since smuggling probes may disrupt services
Facets
cli-tool · maturity active
penetration-testing security http-client security penetration-testing web-development python cli cross-platform http-request-smuggling http-desync web-security bug-bounty pentesting vulnerability-detection python3 te-cl cl-te recon
1 source
- readme: https://github.com/defparam/smuggler · fetched 2026-08-28 · 187dbf639b71
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| defparam/smuggler | main | 32 |
For agents
markdown · JSON · MCP: product_card(name="defparam/smuggler")
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem