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 of up to $230 million, depending on the resolution of the situation. The incident centers on 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 forging a valid transfer message, resulting in the creation of new tokens without backing. The attacker then deposited these tokens into Aave as collateral and borrowed approximately $190 million in ETH and related assets, leaving Aave exposed to potentially impaired collateral. Aave Labs quickly moved to contain the risk by freezing rsETH markets, setting loan-to-value ratios to zero, and halting new borrowing against the asset. The outcome now depends on how Kelp handles the shortfall, with the potential for an estimated 15% depegging of the token if losses are spread across all rsETH holders, resulting in around $124 million in bad debt for Aave. If losses are isolated to Layer 2 networks, the impact could be more severe, with bad debt rising to roughly $230 million. The exploit stemmed from weaknesses in Kelp's verification of cross-chain messages using LayerZero, allowing the attacker to extract value from the system. The incident has raised concerns about the safety of interconnected DeFi infrastructure and has led to a broad pullback, with around $6 billion in total value locked withdrawn from Aave. Discussions are underway to address potential losses, with Kelp's DAO treasury holding approximately $181 million in assets.