unboundcompute/security-agent-skills · skills/hunting-signature-replay-and-eip712-domain-trust/SKILL.md

hunting-signature-replay-and-eip712-domain-trust skillA

hunting-signature-replay-and-eip712-domain-trust is agent-read markdown (skill) from unboundcompute/security-agent-skills: Hunt for signed messages a contract or backend accepts more than once or in a context they were never meant for: an EIP-712 signature with no nonce so it replays, a signature missing chain id or verifying-contract in its domain separator so it replays across chains or deployments, a permit or meta-transaction reused after it was already consumed, a signature whose signed fields omit something the action depends on so a different action reuses it, and a signer recovery that accepts a malleable or.

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/hunting-signature-replay-and-eip712-domain-trust@git:20260901.f8395d1
Exact content
mdr add unboundcompute/security-agent-skills/hunting-signature-replay-and-eip712-domain-trust@sha256:32ee71a51a9f0ee8

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_hi7aascr7j4c5cba.svg)](https://markdownregistry.com/a/art_hi7aascr7j4c5cba)

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Versions

versioncommittedcommitsizeaudit
git:20260901.f8395d1 latest2026-09-01 f8395d1 10,034 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 (10034 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_hi7aascr7j4c5cba
GET https://markdownregistry.com/api/v1/resolve?ref=unboundcompute/security-agent-skills/hunting-signature-replay-and-eip712-domain-trust
GET https://markdownregistry.com/api/v1/blob/32ee71a51a9f0ee8ea06d6b641c5c7e4c947e61d2792bc551cd27721c85d0f20

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