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, pending the resolution of the situation. According to a report from Aave Labs and LlamaRisk, 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 manipulated this setup by creating a fake transfer message, resulting in the creation of new, unbacked tokens. The attacker then deposited these tokens into Aave as collateral and borrowed approximately $190 million in ETH and related assets, leaving Aave vulnerable to impaired collateral. Aave Labs acted swiftly to mitigate the risk by freezing rsETH markets, setting loan-to-value ratios to zero, and halting new borrowing against the asset. The outcome now hinges on Kelp's handling of the shortfall. If losses are spread across all rsETH holders, the token may experience a 15% depegging, resulting in around $124 million in bad debt for Aave. However, if losses are isolated to Layer 2 networks, the impact could be more severe, with bad debt reaching approximately $230 million. The exploit was made possible by weaknesses in Kelp's verification process for cross-chain messages using LayerZero, allowing the attacker to extract value from the system. This incident has raised concerns about the mispricing of collateral and the risk of undercollateralized loans, prompting users to reduce their exposure to Aave. Approximately $6 billion in total value locked was withdrawn from Aave following the incident, reflecting a broader pullback in response to the uncertainty. The episode highlights Aave's indirect exposure to external systems, resulting in increased collateral risk, pressure on lending positions, and a decline in deposits. Discussions are underway with ecosystem participants to address potential losses, with Aave's DAO treasury holding around $181 million in assets.