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 final impact hinging 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 creating a forged 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. Aave Labs took swift action to contain the risk by freezing rsETH markets and halting new borrowing against the asset. The outcome now depends on how Kelp handles the shortfall, with potential losses ranging from $124 million to $230 million. The exploit stemmed from weaknesses in Kelp's verification of cross-chain messages using LayerZero, allowing the attacker to manipulate the process and extract value from the system. In response to the incident, users withdrew around $6 billion in total value locked from Aave, reflecting a broad pullback due to uncertainty. 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 Kelp's DAO treasury holding approximately $181 million in assets.