te0-request-smuggling SKILL.md skillA
te0-request-smuggling from dreadnode/capabilities is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add dreadnode/capabilities/te0-request-smuggling@git:20260820.7bb06b5Pins git:20260820.7bb06b5 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- dreadnode/capabilities
- Path
capabilities/web-security/skills/te0-request-smuggling/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260820.7bb06b5, committed Aug 20, 2026
- First version recorded
- May 4, 2026
- Size
- 1,764 bytes
- Repository stars
- 22
- License
- MIT
TE.0 request smuggling where front-end processes Transfer-Encoding chunked but back-end ignores it entirely. Use when reverse proxy + backend detected and standard CL.TE/TE.CL fails.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# TE.0 Request Smuggling ## Pattern - Reverse proxy + backend architecture (common in cloud deployments) - Standard CL.TE and TE.CL smuggling attempts failed - Backend ignores Transfer-Encoding header entirely (treats body as length 0) - Front-end processes chunked encoding and forwards full body - Google Cloud, AWS ALB, nginx + misconfigured backends common targets ## Probe ```http OPTIONS / HTTP/1.1 Host: target.com Transfer-Encoding: chunked Content-Length: 0 50 GET /admin HTTP/1.1 Host: target.com X-Ignore: x 0 ``` **Key details:** - OPTIONS method specifically — GET/POST may be handled differently - Front-end sees chunked body, forwards it. Backend sees CL:0, ignores body. - Smuggled request (`GET /admin`) poisons the next legitimate request's response. - Vary the smuggled path to confirm: `/admin`, `/logout`, redirect to attacker domain. ## Indicators - Next legitimate request returns response for smuggled path (response poisoning) - Unexpected 3xx redirect to attacker-controlled domain - Session data from other users appears in your response - Timing: second request arrives faster than expected (already queued) ## Chain With …
Read the whole file at its exact version.
How to install
mdr add dreadnode/capabilities/te0-request-smuggling@sha256:ce15fd03c1753fbbThe line at the top of this page pins the label git:20260820.7bb06b5, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_lxpicxqkuhd7yqto)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between May 4, 2026 and Aug 20, 2026, about one every 108 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260820.7bb06b5 latest | 2026-08-20 | 7bb06b5 | 1,764 B | A | view · diff |
| git:20260504.2a64374 | 2026-05-04 | 2a64374 | 1,613 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (1764 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 link to a raw IP address
- pass: No script tag
Source
dreadnode/capabilities · 22 stars · license MIT · pushed 2026-11-02 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_lxpicxqkuhd7yqto GET https://markdownregistry.com/api/v1/resolve?ref=dreadnode/capabilities/te0-request-smuggling GET https://markdownregistry.com/api/v1/blob/ce15fd03c1753fbbb45e6840a36f789784f0b0677ff1f06a5e270fa701d657f0
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.