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, contingent upon the resolution of the situation. 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 forged transfer message, resulting in the creation of 116,500 rsETH without 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 has taken measures to mitigate the risk, including freezing rsETH markets and halting new borrowing. The outcome now depends on how Kelp handles the shortfall, with two possible scenarios: if losses are spread across all rsETH holders, the token would experience an estimated 15% depegging, resulting in around $124 million in bad debt for Aave, or if losses are isolated to Layer 2 networks, the impact would 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. The incident has raised concerns about the safety of interconnected DeFi infrastructure, with users withdrawing around $6 billion in total value locked from Aave. Discussions are underway to address potential losses, with Kelp's DAO treasury holding approximately $181 million in assets.