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 Aave, a lending protocol, at risk of losing up to $230 million, depending on the outcome. The incident revolves around rsETH, a liquid restaking token issued by KelpDAO, which relies on a bridge mechanism to move tokens between blockchains. An attacker manipulated this setup by creating a fake transfer message, resulting in the release of 116,500 rsETH from the Ethereum-side bridge without actual backing. Instead of selling the assets, the attacker used 89,567 rsETH as collateral to borrow approximately $190 million in ETH and related assets across Ethereum and Arbitrum, exposing Aave to potentially impaired collateral. Aave Labs responded by freezing rsETH markets, setting loan-to-value ratios to zero, and halting new borrowing against the asset. The outcome now hinges on how Kelp handles the shortfall. If losses are spread across all rsETH holders, the token may face 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 rising to roughly $230 million. The exploit was made possible by weaknesses in Kelp's verification of cross-chain messages using LayerZero, allowing the attacker to extract value from the system. This incident has raised concerns about the potential for mispriced or undercollateralized loans and has led to a significant withdrawal of funds from Aave, with around $6 billion in total value locked being removed. The report highlights Aave's indirect exposure to external systems and the need for ecosystem participants to address potential losses, with discussions underway to allocate losses and mitigate the impact.