mythril

Execute symbolic execution and multi-transaction analysis on Solidity smart contracts.

Updated Aug 23, 2026
One-click install
npx skills add https://github.com/0xinit/cryptoskills --skill mythril
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: mythril
Source: https://github.com/0xinit/cryptoskills/tree/main/skills/mythril
Command: npx skills add https://github.com/0xinit/cryptoskills --skill mythril

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) and references (resource) components.

What problem does it solve?

This Skill identifies complex security vulnerabilities in smart contracts that static analysis tools often miss, by performing deep symbolic execution and multi-transaction analysis.

Core Features & Use Cases

  • Symbolic Execution: Analyzes contract bytecode to prove exploitability of vulnerabilities.
  • Multi-Transaction Analysis: Detects bugs that only manifest across several sequential transactions (e.g., reentrancy across functions, privilege escalation).
  • Vulnerability Detection: Finds issues like reentrancy, integer overflows, unchecked calls, and more, mapping them to SWC IDs.
  • Use Case: Secure your DeFi protocol by running a deep analysis to uncover subtle reentrancy bugs or access control bypasses that could lead to fund loss.

Quick Start

Analyze the smart contract 'Vault.sol' for security vulnerabilities.

Frequently Asked Questions about mythril

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How does symbolic execution find smart contract vulnerabilities?

Symbolic execution finds smart contract vulnerabilities by analyzing contract bytecode and simulating transaction sequences to mathematically prove exploitability. It maps identified issues like reentrancy and integer overflows to standard SWC IDs.

Can symbolic execution detect reentrancy across multiple transactions?

Yes, symbolic execution detects reentrancy across multiple transactions by performing deep multi-transaction analysis. This uncovers complex privilege escalation and reentrancy bugs that only manifest across several sequential function calls.

How do I audit a Solidity smart contract for security vulnerabilities?

You audit a Solidity smart contract by running a deep symbolic execution analysis on the contract bytecode. This simulates transaction sequences to identify security vulnerabilities like unchecked calls and access control bypasses.

Do I need Mythril CLI or Docker to run symbolic execution on smart contracts?

Yes, you need the Mythril CLI or Docker installed to run symbolic execution on smart contracts. The analysis requires this execution environment to leverage SMT solvers for simulating bytecode transaction sequences.

What is the best way to find access control bypasses in DeFi protocols?

The best way to find access control bypasses in DeFi protocols is using deep symbolic execution. It uncovers subtle security vulnerabilities that static analysis often misses by proving exploitability through multi-transaction simulation.

Why does static analysis miss smart contract vulnerabilities?

Static analysis misses smart contract vulnerabilities because it lacks deep multi-transaction simulation. Symbolic execution overcomes this by using SMT solvers to prove complex exploitability across sequential function calls.