Oracle Flash Loan Attacks

Oracle flash loan attacks are a type of exploit where an attacker uses a flash loan ⎊ a massive, uncollateralized loan that must be repaid in the same transaction ⎊ to manipulate the price of an asset on a decentralized exchange. This artificial price spike is then fed to an oracle, which the attacker uses to trigger unfair liquidations or drain funds from a derivative protocol.

Because the entire process happens within a single block, it is difficult to defend against without robust oracle design. Protocols often combat this by using time-weighted average prices or requiring data from multiple decentralized exchanges.

These attacks highlight the vulnerability of protocols that rely on single-source price feeds. They demonstrate the importance of building resilient oracle systems that can ignore transient price anomalies caused by temporary liquidity imbalances.

Understanding these attacks is crucial for any developer building on decentralized financial infrastructure.