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 outcome 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 releasing 116,500 rsETH from the Ethereum-side bridge. 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 swiftly responded 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 DAO handles the shortfall. 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. However, if losses are isolated to Layer 2 networks, the impact would be more severe, with bad debt rising to approximately $230 million, primarily affecting networks like Arbitrum and Mantle. The exploit stemmed from weaknesses in Kelp's cross-chain message verification process using LayerZero, allowing the attacker to extract value from the system. This incident has raised concerns about the potential for mispriced or undercollateralized loans on Aave, prompting users to reduce their exposure and withdraw around $6 billion in total value locked from the platform. The episode highlights Aave's indirect exposure to external systems, resulting in increased collateral risk, pressure on lending positions, and a decline in deposits as users reassess the safety of interconnected DeFi infrastructure. With Aave's DAO treasury holding approximately $181 million in assets, discussions are underway with ecosystem participants to address potential losses, although Kelp has yet to outline its plan for allocating losses, leaving Aave's ultimate exposure uncertain.