unboundcompute/security-agent-skills · skills/auditing-jwt-verification-and-key-trust/SKILL.md

auditing-jwt-verification-and-key-trust skillA

auditing-jwt-verification-and-key-trust is agent-read markdown (skill) from unboundcompute/security-agent-skills: Audit how a service verifies JSON Web Tokens for the classic verification bypasses: an algorithm-confusion attack where a token switches the signing algorithm so a public key is used as a symmetric secret or the algorithm is set to none, a key selected from an attacker-controllable header (a key id, a JWKS URL, or an embedded key) so the token names its own signer, a signature that is decoded but not actually verified, and claims (expiry, issuer, audience) that are parsed but not enforced. Cover.

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 unboundcompute/security-agent-skills/auditing-jwt-verification-and-key-trust@git:20260829.b60f9b2
Exact content
mdr add unboundcompute/security-agent-skills/auditing-jwt-verification-and-key-trust@sha256:8858cbd9eb1343e9

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_vwnqgwpfrniqdq52.svg)](https://markdownregistry.com/a/art_vwnqgwpfrniqdq52)

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Versions

versioncommittedcommitsizeaudit
git:20260829.b60f9b2 latest2026-08-29 b60f9b2 9,696 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 (9696 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

unboundcompute/security-agent-skills · 5 stars · license MIT · pushed 2026-09-08 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_vwnqgwpfrniqdq52
GET https://markdownregistry.com/api/v1/resolve?ref=unboundcompute/security-agent-skills/auditing-jwt-verification-and-key-trust
GET https://markdownregistry.com/api/v1/blob/8858cbd9eb1343e93b31ff0fbc6c180a3b613c58a7c702606502d99084c18af2

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