substrate-vulnerability-scanner SKILL.md skillA
substrate-vulnerability-scanner from trailofbits/skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add trailofbits/skills/substrate-vulnerability-scanner@git:20260831.6feac67Pins git:20260831.6feac67 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- trailofbits/skills
- Path
plugins/building-secure-contracts/skills/substrate-vulnerability-scanner/SKILL.md- Versions recorded
- 3
- Latest version
- git:20260831.6feac67, committed Aug 31, 2026
- First version recorded
- Jan 26, 2026
- Size
- 12,800 bytes
- Repository stars
- 7,698
- License
- CC-BY-SA-4.0
Scans Substrate/Polkadot pallets for 7 critical vulnerabilities including arithmetic overflow, panic DoS, incorrect weights, and bad origin checks. Use when auditing Substrate runtimes or FRAME pallets.
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
# Substrate Vulnerability Scanner
## 1. Purpose
Systematically scan Substrate runtime modules (pallets) for platform-specific security vulnerabilities that can cause node crashes, DoS attacks, or unauthorized access. This skill encodes 7 critical vulnerability patterns unique to Substrate/FRAME-based chains.
## 2. When to Use This Skill
- Auditing custom Substrate pallets
- Reviewing FRAME runtime code
- Pre-launch security assessment of Substrate chains (Polkadot parachains, standalone chains)
- Validating dispatchable extrinsic functions
- Reviewing weight calculation functions
- Assessing unsigned transaction validation logic
## 3. Platform Detection
### File Extensions & Indicators
- **Rust files**: `.rs`
### Language/Framework Markers
```rust
// Substrate/FRAME indicators
#[pallet]
pub mod pallet {
use frame_support::pallet_prelude::*;
use frame_system::pallet_prelude::*;
#[pallet::config]
pub trait Config: frame_system::Config { }
#[pallet::call]
impl<T: Config> Pallet<T> {
#[pallet::weight(10_000)]
pub fn example_function(origin: OriginFor<T>) -> DispatchResult { }
}
}
// Common patterns
DispatchResult, DispatchError
…Read the whole file at its exact version.
How to install
mdr add trailofbits/skills/substrate-vulnerability-scanner@sha256:6d8557b382bf9b43The line at the top of this page pins the label git:20260831.6feac67, 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_7k4whbufefrhalum)
1 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between Jan 26, 2026 and Aug 31, 2026, about one every 109 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260831.6feac67 latest | 2026-08-31 | 6feac67 | 12,800 B | A | view · diff |
| git:20260129.650f6e3 | 2026-01-29 | 650f6e3 | 9,550 B | A | view · diff |
| git:20260126.7af5b1b | 2026-01-26 | 7af5b1b | 9,572 B | A | view |
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 (12800 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
trailofbits/skills · 7,698 stars · license CC-BY-SA-4.0 · pushed 2026-10-22 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_7k4whbufefrhalum GET https://markdownregistry.com/api/v1/resolve?ref=trailofbits/skills/substrate-vulnerability-scanner GET https://markdownregistry.com/api/v1/blob/6d8557b382bf9b437d9431bb31e803de8e137eb1b58dfa0d0e2fb45db285f6a4
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.