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

A recent bridge exploit involving Kelp DAO and LayerZero 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 move tokens between blockchains. An attacker exploited this setup by creating a forged transfer message, resulting in the creation of new tokens without backing. The attacker then deposited these tokens into Aave as collateral, borrowing approximately $190 million in ETH and related assets. Aave Labs quickly responded by freezing rsETH markets and halting new borrowing against the asset. The outcome now depends on how Kelp handles the shortfall, with possible 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 cross-chain message verification process using LayerZero, allowing the attacker to extract value from the system. The incident has raised concerns about the security of interconnected DeFi infrastructure and has led to a significant withdrawal of total value locked from Aave.