hunt-grpc SKILL.md skillA
hunt-grpc from novaestellar/novahaku is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add novaestellar/novahaku/hunt-grpc@git:20260928.dd7c042Pins git:20260928.dd7c042 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- novaestellar/novahaku
- Path
testing/hunt/hunt-grpc/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260928.dd7c042, committed Sep 28, 2026
- Size
- 17,266 bytes
- Repository stars
- 28
- License
- MIT
Hunt gRPC vulnerabilities — server reflection enabled (enumerate all services/methods), missing authentication / metadata-stripping on internal endpoints, plaintext gRPC over HTTP/2, internal endpoint disclosure, proto file leakage, gRPC-Web/grpc-gateway transcoding injection, and HTTP/2 Rapid Reset DoS (CVE-2023-44487). Use when target exposes port 50051 / 443 / 8443 / 9090 with HTTP/2, when grpcurl/grpcui detects reflection, when an Envoy or grpc-gateway proxy is fronting a microservice, or…
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
# HUNT-GRPC — gRPC Security ## Crown Jewel Targets gRPC reflection enabled = full service catalog enumeration without source code. The highest-value gRPC bugs come from the architectural assumption that a service is "internal" — auth is enforced at the edge proxy, and the backend trusts any caller that reaches it. Once you reach the backend directly (exposed port, SSRF, proxy bypass), that trust collapses. **Highest-value findings:** - **Reflection enabled in production** — `grpc.reflection.v1alpha.ServerReflection` / `grpc.reflection.v1.ServerReflection` lists every method, message, and internal service. Enumeration enabler, not a vuln on its own (see Validation). - **Missing auth on internal service** — a service designed for east-west microservice traffic exposed externally with no mTLS and no per-method authorization → call privileged methods directly. - **Edge-auth-only / metadata-stripping** — proxy authenticates the user but the backend re-trusts proxy-injected headers (`x-user-id`, `x-tenant-id`, `x-forwarded-*`); if you reach the backend or can inject those headers via the proxy, you impersonate any tenant. …
Read the whole file at its exact version.
How to install
mdr add novaestellar/novahaku/hunt-grpc@sha256:e14cb7a2824064bfThe line at the top of this page pins the label git:20260928.dd7c042, 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_wdxqqrwgevtpbiq3)
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Versions
The registry has recorded 1 version of this file, committed on Sep 28, 2026.
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 (17266 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
novaestellar/novahaku · 28 stars · license MIT · pushed 2026-09-28 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_wdxqqrwgevtpbiq3 GET https://markdownregistry.com/api/v1/resolve?ref=novaestellar/novahaku/hunt-grpc GET https://markdownregistry.com/api/v1/blob/e14cb7a2824064bf8292a271c5fb0a2e7866d3b4caa2562a0a4da30135bf032c
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.