Aave Faces Potential Losses of Up to $230 Million 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, with the final impact dependent on the allocation of the shortfall. The incident centers around rsETH, a liquid restaking token issued by KelpDAO, which relies on a bridge mechanism to move tokens between blockchains. An attacker exploited this setup by forging a valid-looking 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 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 took swift action to contain the risk, freezing rsETH markets, setting loan-to-value ratios to zero, and halting new borrowing against the asset. The outcome now depends largely on Kelp's handling of the shortfall, with estimated losses ranging from $124 million if spread across all rsETH holders to $230 million if isolated to Layer 2 networks. The exploit stemmed from 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 and reassessing their exposure to potential risks. Discussions are underway with ecosystem participants to address potential losses, with the report stating that the DAO treasury holds approximately $181 million in assets.