cairo-vulnerability-scanner

An agent skill by trailofbits, from trailofbits/skills. Tags: analysis, blockchain, security, smart-contracts, starknet.

What it does

Scans Cairo/StarkNet smart contracts for 6 critical vulnerabilities including felt252 arithmetic overflow, L1-L2 messaging issues, address conversion problems, and signature replay. Use when auditing StarkNet projects.

Install

With the skills CLI, which installs into Claude Code, Codex, Cursor and other agents:

npx skills add trailofbits/skills --skill cairo-vulnerability-scanner

Or copy the skill folder into Claude Code's skills directory by hand (~/.claude/skills for every project, or .claude/skills inside one):

git clone --depth 1 https://github.com/trailofbits/skills
cp -r skills/plugins/building-secure-contracts/skills/cairo-vulnerability-scanner ~/.claude/skills/cairo-vulnerability-scanner

Safety box score

Not rated yet. A safety box score grades what a skill and its scripts can reach on the machine of whoever installs it, across eight categories from shell execution to secrets access. Anyone can request one from this page; it is saved for everyone. How the score works.

Source

Repository

trailofbits/skills (all skills from this repository)

Path

plugins/building-secure-contracts/skills/cairo-vulnerability-scanner/SKILL.md

Branch

main

Collection

building-secure-contracts

Updated

2026-09-19

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• solana-vulnerability-scanner — Scans Solana programs for 6 critical vulnerabilities including arbitrary CPI, improper PDA validation, missing signer/ownership checks, and sysvar spoofing.
• substrate-vulnerability-scanner — Scans Substrate/Polkadot pallets for 7 critical vulnerabilities including arithmetic overflow, panic DoS, incorrect weights, and bad origin checks.
• token-integration-analyzer — Token integration and implementation analyzer based on Trail of Bits' token integration checklist.
• ton-vulnerability-scanner — Scans TON (The Open Network) smart contracts for 3 critical vulnerabilities including integer-as-boolean misuse, fake Jetton contracts.