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 published by Aave Labs and LlamaRisk on the Aave governance forum, the incident revolves around rsETH, a liquid restaking token issued by KelpDAO. The protocol uses a bridge mechanism to transfer rsETH between blockchains, which was exploited by an attacker who forged a 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 promptly took action 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 largely depends on how Kelp handles 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 was made possible by weaknesses in Kelp's verification of cross-chain messages using LayerZero, allowing the attacker to manipulate the process and extract value from the system. The incident has raised concerns about the potential for undercollateralized loans and has led to a significant withdrawal of funds from Aave, with around $6 billion in total value locked being withdrawn. The episode highlights the indirect exposure of Aave to external systems and the need for careful risk management. Discussions are underway with ecosystem participants to address potential losses, and the report notes that the DAO treasury holds approximately $181 million in assets.