Secure Your Smart Contracts

Comprehensive database of Web3 vulnerabilities with real examples, prevention strategies, and security best practices

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38
Documented Vulnerabilities
5
Critical Severity
7
Categories

Critical Vulnerabilities

Explore the most critical smart contract vulnerabilities that every Web3 developer should know

🔄Reentrancy & External Calls

Reentrancy

Reentrancy Reentrancy is an attack that can occur when a bug in a contract may allow a malicious contract to reenter the contract unexpectedly during...

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🔐Access Control & Authorization

Insufficient Access Control

Insufficient Access Control Access control is often imperative in management and ownership of smart contracts. It's important to consider ways in whi...

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🔢Arithmetic & Logic Errors

Overflow Underflow

Integer Overflow and Underflow In solidity, Integer types have maximum and minimum values. Integer overflow occurs when an integer variable exceeds th...

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🔑Randomness & Cryptography

Weak Sources Randomness

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🔐Access Control & Authorization

Delegatecall Untrusted Callee

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⛔Denial of Service

Dos Gas Limit

DoS with Block Gas Limit One of the primary benefits of a block gas limit is that it prevents attackers from creating an infinite transaction loop. I...

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Browse by Category

Vulnerabilities organized into 7 intuitive categories

🔐

Access Control & Authorization

Vulnerabilities related to improper access control, permissions, and authorization mechanisms

4 vulnerabilities→
🔄

Reentrancy & External Calls

Issues arising from external contract calls and reentrancy attacks

4 vulnerabilities→
⛔

Denial of Service

Vulnerabilities that can lead to DoS attacks and service disruption

3 vulnerabilities→
🔢

Arithmetic & Logic Errors

Mathematical operations, overflow/underflow, and logical errors

6 vulnerabilities→
🔑

Randomness & Cryptography

Issues with randomness generation, signatures, and cryptographic operations

7 vulnerabilities→
⚙️

Code Quality & Best Practices

Code quality issues, deprecated functions, and non-adherence to best practices

9 vulnerabilities→
💾

Data & Storage Vulnerabilities

Issues related to storage, data handling, and on-chain privacy

5 vulnerabilities→

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