Aave Faces Potential Losses of Up to $230 Million Following Kelp DAO Bridge Exploit

A recent exploit of the Kelp DAO and LayerZero bridge has put lending protocol Aave at risk of losing up to $230 million, with the outcome dependent on how the situation is resolved. The incident revolves around rsETH, a liquid restaking token issued by KelpDAO, which relies on a bridge mechanism to transfer tokens between blockchains. An attacker exploited this setup by creating a forged transfer message, resulting in the creation of new tokens without backing and the release of 116,500 rsETH from the Ethereum-side bridge. Instead of selling the assets, the attacker used 89,567 rsETH as collateral to borrow around $190 million in ETH and related assets, leaving Aave vulnerable to collateral with potentially impaired backing. Aave Labs quickly contained the risk by freezing rsETH markets, setting loan-to-value ratios to zero, and halting new borrowing against the asset. The outcome now largely depends on how Kelp handles the shortfall, with estimated losses ranging from $124 million if spread across all rsETH holders to $230 million if isolated to Layer 2 networks. The exploit was made possible by weaknesses in Kelp's verification of cross-chain messages using LayerZero, allowing the attacker to manipulate the process and extract value from the system. The incident has raised concerns about mispriced or undercollateralized loans and has led to a significant withdrawal of around $6 billion in total value locked from Aave. The episode highlights Aave's indirect exposure to external systems, with increased collateral risk, pressure on lending positions, and a decline in deposits. Discussions are underway to address potential losses, with Aave's DAO treasury holding approximately $181 million in assets.