Here are three specific DeFi smart contract vulnerabilities suitable for inclusion in a professional audit report. Each entry follows standard industry format, including the vulnerability type, technical description, potential impact, and remediation advice.
1. Reentrancy in Token Swap Function
Vulnerability Type: Reentrancy (CWE-693)
Severity: High
Location: Swap.sol → swap() function (lines 42–58)
Description:
The swap() function allows users to exchange tokens within the pool. The function executes an external call to IERC20(tokenOut).transfer(msg.sender, amountOut) before updating the internal pool reserves (reserve0 and reserve1). This violates the Checks-Effects-Interactions pattern.
An attacker can deploy a malicious token contract that implements transfer() to recursively call swap() again before the first call completes. Since the
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