dreadnode/capabilities · capabilities/web-security/skills/crlf-response-splitting/SKILL.md

crlf-response-splitting skillB

crlf-response-splitting is agent-read markdown (skill) from dreadnode/capabilities: Nested response splitting to bypass strict CSP via CRLF injection. Turns header injection into XSS even when script-src is self only. Use when CRLF injection is confirmed in response headers and CSP blocks inline or external scripts..

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/crlf-response-splitting@git:20260529.8f6ea0e
Exact content
mdr add dreadnode/capabilities/crlf-response-splitting@sha256:fbcdacf572074a43

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_4hyhvmf6ufn4gl3w.svg)](https://markdownregistry.com/a/art_4hyhvmf6ufn4gl3w)

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Versions

versioncommittedcommitsizeaudit
git:20260529.8f6ea0e latest2026-05-29 8f6ea0e 2,733 BB view · diff
git:20260504.2a643742026-05-04 2a64374 2,380 BB view

Audit of the latest version

B  16 of 17 checks passed. Deterministic, no model, same answer every run.
  • fail: No script tag (matched: <script)
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (2733 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

Source

GitHub

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

API

GET https://markdownregistry.com/api/v1/artifacts/art_4hyhvmf6ufn4gl3w
GET https://markdownregistry.com/api/v1/resolve?ref=dreadnode/capabilities/crlf-response-splitting
GET https://markdownregistry.com/api/v1/blob/fbcdacf572074a434dcbf8a487d5c2aa543e7be9d1875083f3a414c910c515fa

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