An anonymous trader exploited a rebase bug in SYFI's unaudited contract code. By staking a small amount and leveraging the arithmetic error in the rebase logic, they extracted nearly $250K in realized gains while crashing the token price from $174 to $0.0004.

Amplify, a user of DeFi, discovered a bug in SYFI, a smart contract for DeFi, and made 747 ETH on a single transaction, but from other users. The project crashed.