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

hunt-ssti skillC

hunt-ssti is agent-read markdown (skill) from novaestellar/novahaku: Hunt server-side template injection (SSTI) across Jinja2 (Flask/Django), Twig (Symfony), Freemarker (Java), ERB (Rails), Spring, Velocity, Mako, Thymeleaf, Smarty. Detection probes use double-curly and dollar-curly math expressions evaluated server-side. Once an engine is fingerprinted, escalate to RCE via the engine-specific class-walker, callback-registrar, or Execute-utility patterns documented in disclosed reports. Detection patterns: error messages reveal engine, blank or numeric eval revea.

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-ssti@git:20260910.546fe86
Exact content
mdr add novaestellar/novahaku/hunt-ssti@sha256:f39c674e593dced3

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_4jwbcap637r4pp3j.svg)](https://markdownregistry.com/a/art_4jwbcap637r4pp3j)

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Versions

versioncommittedcommitsizeaudit
git:20260910.546fe86 latest2026-09-10 546fe86 7,315 BC view · diff
git:20260903.29924dd2026-09-03 29924dd 7,327 BC view · diff
git:20260903.fa855c42026-09-03 fa855c4 7,298 BC view

Audit of the latest version

C  15 of 17 checks passed. Deterministic, no model, same answer every run.
  • fail: No link to a raw IP address (matched: http://169.254.169.254)
  • 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 (7315 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

Source

GitHub

novaestellar/novahaku · 24 stars · license none · pushed 2026-09-10 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_4jwbcap637r4pp3j
GET https://markdownregistry.com/api/v1/resolve?ref=novaestellar/novahaku/hunt-ssti
GET https://markdownregistry.com/api/v1/blob/f39c674e593dced3f40472ece4052fbf37eb66264c17949b762e6909260458f9

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