Here are three specific DeFi smart contract vulnerabilities suitable for inclusion in a professional security audit report, complete with technical details, impact, and remediation advice.
1. Reentrancy in Cross-Protocol Yield Aggregators
Vulnerability Type: Reentrancy (External Call Before State Update)
CWE: CWE-841: Sleep in Loop with External Interaction
Severity: High
Description:
This vulnerability occurs in yield aggregators or vault contracts that interact with external protocols (e.g., Aave, Compound) to deposit or withdraw assets. The contract performs an external call to a third-party protocol before updating its internal state (e.g., the user’s balance or total assets). If the third-party protocol is malicious or itself vulnerable to reentrancy, it can re-enter the aggregator’s function before the state update completes.
Code Example (Vulnerable Pattern):
solidity
function deposit(address token, uint
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