What Is a ‘Front-Running’ Attack in the Context of an Oracle Price Update?

A front-running attack occurs when a malicious actor sees a pending, profitable oracle price update transaction in the memory pool (mempool). The attacker then submits their own transaction with a higher gas fee to execute a trade (e.g. a large options position) before the oracle price update is confirmed, profiting from the imminent, predictable price change.

What Is the Difference between Gas Limit and Gas Price?
How Does ‘Slippage’ Affect the Execution of a Decentralized Options Trade?
What Is “Front-Running” and How Does Oracle Latency Enable It?
What Is the Risk of Front-Running in Decentralized Options Trading?
What Is ‘Front-Running’ in the Context of DeFi and Oracles?
Define ‘Front-Running’ and How It Exploits Low Finality in Trading
What Is the ‘Front-Running’ Risk Associated with Oracle Updates?
How Does a Higher Gas Fee Enable Front-Running?

Glossar