Aave Faces Potential $230 Million Loss Following Kelp DAO Bridge Exploit

A recent bridge exploit involving Kelp DAO and LayerZero has put lending protocol Aave at risk of losing up to $230 million. 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 forged 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 from Aave, exposing the protocol to potentially impaired collateral. Aave contained the risk by freezing rsETH markets, setting loan-to-value ratios to zero, and halting new borrowing. The outcome now depends on how Kelp DAO handles the shortfall. If losses are spread across all rsETH holders, Aave would face around $124 million in bad debt due to a 15% depegging of the token. 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 highlighted weaknesses in Kelp's verification of cross-chain messages using LayerZero, allowing the attacker to extract value from the system. In response, users withdrew around $6 billion in total value locked from Aave, reflecting a broad pullback due to uncertainty. The incident has raised concerns about the safety of interconnected DeFi infrastructure and Aave's indirect exposure to external systems. Discussions are underway to address potential losses, with Aave's DAO treasury holding approximately $181 million in assets.