Question > Category > Blockchain

Q » What is a reentrancy attack?

Jamessd

02 Nov, 2025

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A » A reentrancy attack is a vulnerability specific to smart contracts on blockchain platforms, where an attacker repeatedly calls a function in a contract before previous executions are completed. This can lead to unauthorized fund withdrawals or state manipulations. It exploits the fact that smart contract operations aren't atomic, allowing attackers to execute malicious functions repeatedly before the contract updates its state or balance.

Michael

03 Nov, 2025

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All Other Answer

A »A reentrancy attack occurs when an attacker repeatedly withdraws funds from a smart contract before the contract can update its internal state, exploiting a vulnerability in the contract's logic. This can drain the contract's funds. It's a significant threat in blockchain security, particularly in DeFi applications.

David

03 Nov, 2025

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