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 losses of up to $230 million, depending on the resolution of the situation. 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 exploited this setup by forging a 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 deposited 89,567 rsETH into Aave as collateral and borrowed approximately $190 million in ETH and related assets. Aave Labs quickly contained the risk 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: a 15% depegging of the token if losses are spread across all rsETH holders, resulting in around $124 million in bad debt for Aave, or a more severe impact if losses are isolated to Layer 2 networks, with bad debt rising to roughly $230 million. The exploit was caused by weaknesses in Kelp's verification of cross-chain messages using LayerZero, allowing the attacker to manipulate the process and extract value from the system. The incident has raised concerns about the safety of interconnected DeFi infrastructure and has led to a broad pullback, with around $6 billion in total value locked withdrawn from Aave. Discussions are underway to address potential losses, with Aave's DAO treasury holding approximately $181 million in assets.