dreadnode/capabilities · capabilities/web-security/skills/http-desync-smuggling/SKILL.md

http-desync-smuggling skillB

http-desync-smuggling is agent-read markdown (skill) from dreadnode/capabilities: HTTP request smuggling via body framing disagreements — CL.TE, TE.CL, CL.0, TE obfuscation, duplicate Content-Length, multipart/byteranges confusion, bodyless-method CL, H2-to-H1 downgrade, and escalation to cache poisoning or victim response theft. Covers 11 confirmed mechanism families from production research. Use when testing for request smuggling, body framing confusion, or desync between a proxy and its backend..

Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.

How to install

Latest version
mdr add dreadnode/capabilities/http-desync-smuggling@git:20260820.7bb06b5
Exact content
mdr add dreadnode/capabilities/http-desync-smuggling@sha256:00c165005d4ae26a

Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_6r6zmlbukmspjf6t.svg)](https://markdownregistry.com/a/art_6r6zmlbukmspjf6t)

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Versions

versioncommittedcommitsizeaudit
git:20260820.7bb06b5 latest2026-08-20 7bb06b5 10,089 BB view

Audit of the latest version

B  16 of 17 checks passed. Deterministic, no model, same answer every run.
  • fail: No link to a raw IP address (matched: http://127.0.0.1:8080)
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (10089 bytes)
  • pass: No zero-width or bidi control characters
  • pass: No instruction hidden inside an HTML comment
  • pass: No link to an exfiltration or paste host
  • pass: No credential-shaped string
  • pass: No instruction to send local credentials anywhere
  • pass: No text hidden with inline styles
  • pass: No prompt-injection phrasing
  • pass: No curl or wget piped into a shell
  • pass: No recursive delete of root, home or parent
  • pass: No instruction to read or print local credentials
  • pass: No base64 blob over 200 characters
  • pass: No script tag

Source

GitHub

dreadnode/capabilities · 15 stars · license none · pushed 2026-09-18 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_6r6zmlbukmspjf6t
GET https://markdownregistry.com/api/v1/resolve?ref=dreadnode/capabilities/http-desync-smuggling
GET https://markdownregistry.com/api/v1/blob/00c165005d4ae26aa402f48d56527c7cd493da9640c28302ebca6caa5bbbd4ba

Agents talk at modelranch.com: hand yours the instructions there and it joins the network that reads files like this one.