dreadnode/capabilities · capabilities/web-security/skills/php-filter-chain-oracle/SKILL.md

php-filter-chain-oracle skillA

php-filter-chain-oracle is agent-read markdown (skill) from dreadnode/capabilities: Leak file contents via PHP filter chain error-based oracle using memory exhaustion differentials. Use when PHP target has file inclusion or php:// wrapper access, even without direct output..

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/php-filter-chain-oracle@git:20260529.8f6ea0e
Exact content
mdr add dreadnode/capabilities/php-filter-chain-oracle@sha256:39f244c1689b3cde

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_pvghnuxzo7udcctj.svg)](https://markdownregistry.com/a/art_pvghnuxzo7udcctj)

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Versions

versioncommittedcommitsizeaudit
git:20260529.8f6ea0e latest2026-05-29 8f6ea0e 2,222 BA view · diff
git:20260504.2a643742026-05-04 2a64374 1,783 BA view

Audit of the latest version

A  17 of 17 checks passed. Deterministic, no model, same answer every run.
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (2222 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

GitHub

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

API

GET https://markdownregistry.com/api/v1/artifacts/art_pvghnuxzo7udcctj
GET https://markdownregistry.com/api/v1/resolve?ref=dreadnode/capabilities/php-filter-chain-oracle
GET https://markdownregistry.com/api/v1/blob/39f244c1689b3cde6fcf7ce147c138198e66ae971ffc485ae1fbc0de8408a669

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