Smart Contract Security: 10 Vulnerabilities Every Developer Must Know
Smart contract bugs on Ethereum and EVM chains result in millions of dollars in lost funds. Auditing code prior to mainnet deployment is mandatory.
1. Reentrancy Attacks & Checks-Effects-Interactions Pattern
Never transfer Ether or external call state before updating internal contract state variables.
// Anti-Reentrancy Guard
bool private locked;
modifier nonReentrant() {
require(!locked, "Reentrant call");
locked = true;
_;
locked = false;
}2. Access Control Vulnerabilities
Always protect admin functions with explicit OpenZeppelin Ownable or AccessControl roles.
3. Front-Running & MEV Exploits
Protect DEX swaps and auctions against Maximum Extractable Value (MEV) bot exploitation using commit-reveal schemes.
Key Takeaway
Code immutability in smart contracts demands rigorous security standards. Always conduct static analysis, fuzzing, and third-party security audits.
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