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 incurring losses of up to $230 million, with the final outcome contingent on the resolution of the situation. According to a report by 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 tokens without backing, and the release of 116,500 rsETH from the Ethereum-side bridge. Instead of selling the assets on the open market, the attacker used 89,567 rsETH as collateral to borrow approximately $190 million in ETH and related assets across Ethereum and Arbitrum, leaving Aave exposed to potentially impaired collateral. Aave Labs responded quickly by freezing rsETH markets, setting loan-to-value ratios to zero, and halting new borrowing against the asset. 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 face 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 manipulate the system and extract value. The incident has raised concerns about the safety of interconnected DeFi infrastructure and has led to a significant withdrawal of around $6 billion in total value locked from Aave. Discussions are underway with ecosystem participants to address potential losses, with Kelp's DAO treasury holding approximately $181 million in assets.