Today, Sifu himself was the victim of a theft as a bug in the SushiSwap decentralized exchange allowed a hacker to make off with around 1,800 ETH (more than $3.3 million) belonging to him. According to SushiSwap leader Jared Grey, around 300 ETH (~$557,000) of Sifu's funds were subsequently recovered.
Analysts have found that almost 200 addresses on the Ethereum network have approved the vulnerable contract, and around 2,000 addresses approved the vulnerable contract on Arbitrum, Polygon, and other chains. It's not yet clear how much was stolen in total. SushiSwap leader Grey urged users via Twitter to revoke approval for the vulnerable smart contract.