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, with the final impact hinging on how Kelp DAO addresses the shortfall. 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 forging a transfer message, effectively creating 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 roughly $190 million in ETH and related assets across Ethereum and Arbitrum, leaving Aave exposed to potentially impaired collateral. Aave Labs swiftly contained the risk by freezing rsETH markets, setting loan-to-value ratios to zero, and halting new borrowing against the asset. The outcome now largely depends on Kelp's handling of the shortfall. If losses are distributed 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 using LayerZero, allowing the attacker to manipulate the process and 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 around $6 billion in total value locked from Aave. 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. Discussions are ongoing with ecosystem participants to address potential losses, with Aave's DAO treasury holding approximately $181 million in assets.