Aave Faces $6 Billion Deposit Exodus Following Kelp Hack, Exposing DeFi Lender's Structural Vulnerabilities

Aave has witnessed a staggering $6.6 billion exodus, not due to a direct hack, but rather a consequence of the Kelp bridge exploit. The protocol's total value locked plummeted from $26.4 billion on April 18 to approximately $20 billion by Sunday morning, according to DefiLlama. The AAVE token suffered a 16% decline to $92, while daily fees surged to $1.99 million as liquidations swept through the weekend. Depositors are fleeing due to Aave's unforeseen burden. Attackers drained 116,500 rsETH from Kelp's bridge, utilizing the stolen tokens as collateral on Aave V3 to borrow wrapped ether. On-chain trackers estimate the Aave-specific borrow to be around $196 million, with total positions across Aave, Compound, and Euler nearing $236 million. As the largest lending protocol in DeFi, Aave enables users to deposit crypto for yield, while others borrow against collateral. Kelp, a liquid restaking protocol, issues receipt tokens, rsETH, which users trade and, crucially, post as collateral on Aave. The exploit saw attackers trick Kelp's cross-chain bridge into releasing 116,500 rsETH, worth approximately $292 million, to a controlled address. They then deposited the stolen rsETH onto Aave V3 as collateral and borrowed wrapped ether against it. Aave initially stated that the Umbrella reserve would cover any deficit, but later softened its stance to exploring paths to offset the deficit. The damage is concentrated due to Aave's loan book spanning 22 chains, with Ethereum alone holding $14.24 billion of the $17.82 billion in outstanding borrows. WETH accounts for 39.49% of all loans on the protocol, making the attack particularly impactful. Aave's founder, Stani Kulechov, confirmed that the exploit was external and the protocol's contracts were not compromised. However, Aave's acceptance of liquid restaking tokens as collateral has left depositors vulnerable. The risk models had priced these tokens as if they would maintain their peg under normal conditions, but none accounted for a scenario where the collateral would become worthless due to a bridge exploit on an unrelated chain. The token price is now reflecting the uncertainty surrounding Umbrella's ability to cover the deficit and the potential loss for stkAAVE holders who back the reserve.