Sentiment, an undercollateralized lending protocol, appears to have been exploited on April 4 for over $500,000 in crypto. Ethereum blockchain data shows a transaction that transferred 536,738.410031 USD Coin (USDC) from the Synapse Bridge, and this links up with a series of Arbitrum transactions draining coins from the Sentiment protocol.
The wallet performing the attack has been labeled "Sentimentxyz Exploiter" by Arbiscan, and the Sentiment team has announced on Twitter that they are aware of a "potential issue" with the protocol.