A reentrancy attack is a type of security vulnerability in smart contracts where an attacker exploits a function that allows for recursive calls before the initial execution is complete. This can lead to unexpected behaviors and state manipulations, allowing the attacker to drain funds or disrupt the intended functionality of the contract. Understanding this vulnerability is crucial for secure smart contract development and deployment, as it highlights the importance of proper handling of external calls and state changes.
congrats on reading the definition of Reentrancy Attack. now let's actually learn it.