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 losses totaling up to $230 million, contingent upon the resolution of the situation. The incident, detailed in a report by Aave Labs and LlamaRisk, centers on rsETH, a liquid restaking token issued by KelpDAO, which relies on a bridge mechanism to transfer tokens between blockchains. An attacker manipulated this setup by creating a forged transfer message, resulting in the creation of new, unbacked tokens. The attacker then deposited these tokens into Aave as collateral, borrowing approximately $190 million in ETH and related assets. Aave swiftly responded by freezing rsETH markets, setting loan-to-value ratios to zero, and halting new borrowing against the asset. The outcome now hinges on Kelp DAO's handling of the shortfall, with potential losses ranging from $124 million if spread across all rsETH holders to $230 million if isolated to Layer 2 networks. The exploit exposed weaknesses in Kelp's verification process for cross-chain messages using LayerZero, allowing the attacker to extract value from the system. In response, users withdrew around $6 billion in total value locked from Aave, reflecting a broader pullback due to the uncertainty surrounding the incident. The episode highlights Aave's indirect exposure to external systems, with increased collateral risk, pressure on lending positions, and a decline in deposits as users reassess the safety of interconnected DeFi infrastructure.