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 published on the Aave governance forum 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 took advantage of this setup by creating a forged transfer message that appeared legitimate, resulting in the creation of new tokens without backing. The attacker then deposited the tokens into Aave as collateral and borrowed approximately $190 million in ETH and related assets, leaving Aave vulnerable to collateral with potentially significant impairments. To mitigate the risk, Aave Labs promptly froze rsETH markets, set loan-to-value ratios to zero, and halted new borrowing against the asset. The outcome now largely depends on how Kelp 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 such as Arbitrum and Mantle. The exploit was made possible by weaknesses in Kelp's cross-chain message verification process using LayerZero, allowing the attacker to manipulate the system and extract value. The incident has raised concerns about the potential for undercollateralized loans and has led to a significant withdrawal of total value locked from Aave, with around $6 billion being withdrawn following the incident. 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 underway with ecosystem participants to address potential losses, with Kelp's DAO treasury holding approximately $181 million in assets.