novaestellar/novahaku · testing/hunt/hunt-cors/SKILL.md

hunt-cors skillF

hunt-cors is agent-read markdown (skill) from novaestellar/novahaku: Hunt CORS Misconfiguration — origin-reflection with credentials, null-origin trust, subdomain-regex bypass (unanchored vs unescaped-dot vs prefix-only), pre-flight (OPTIONS) gating bypass, postMessage origin checks. High only when an attacker-controlled origin can perform a CREDENTIALED cross-origin read of sensitive data and you have proven it in a browser. Use when testing API endpoints, SPAs, or any app emitting Access-Control-* headers..

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 novaestellar/novahaku/hunt-cors@git:20260910.546fe86
Exact content
mdr add novaestellar/novahaku/hunt-cors@sha256:4e8cd6fc600c12c4

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_3m4uzi6sfyzbtqjh.svg)](https://markdownregistry.com/a/art_3m4uzi6sfyzbtqjh)

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Versions

versioncommittedcommitsizeaudit
git:20260910.546fe86 latest2026-09-10 546fe86 14,063 BF view · diff
git:20260903.29924dd2026-09-03 29924dd 14,075 BF view · diff
git:20260903.fa855c42026-09-03 fa855c4 14,046 BF view

Audit of the latest version

F  15 of 17 checks passed. Deterministic, no model, same answer every run.
  • FAIL, critical: No link to an exfiltration or paste host (matched: https://OOB-ID.oastify.com)
  • 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 (14063 bytes)
  • pass: No zero-width or bidi control characters
  • pass: No instruction hidden inside an HTML comment
  • 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

novaestellar/novahaku · 19 stars · license none · pushed 2026-09-10 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_3m4uzi6sfyzbtqjh
GET https://markdownregistry.com/api/v1/resolve?ref=novaestellar/novahaku/hunt-cors
GET https://markdownregistry.com/api/v1/blob/4e8cd6fc600c12c45b5f48db11a414eff17f638c9441a5b040ed63d0e25d0465