Aave Faces $6 Billion Deposit Exodus After Kelp Hack Exposes DeFi Lender's Structural Vulnerability

Aave has experienced a massive exodus of $6.6 billion in deposits, not due to a direct hack, but as a result of a cascading effect from the Kelp hack. The protocol's total value locked plummeted from $26.4 billion to nearly $20 billion, with the AAVE token suffering a 16% decline to $92. Daily fees skyrocketed to $1.99 million as liquidations swept through the weekend. Depositors are fleeing because Aave is now carrying a significant debt burden it did not create. When attackers drained 116,500 rsETH from Kelp's bridge, they used the stolen tokens as collateral on Aave V3 to borrow wrapped ether, leaving Aave to quantify the extent of its bad debt. On-chain trackers estimate the Aave-specific borrow to be around $196 million, with total positions across Aave, Compound, and Euler totaling $236 million. Aave, as the largest lending protocol in DeFi, allows users to deposit crypto to earn yield, while others borrow against collateral. Kelp, a liquid restaking protocol, issues a receipt token called rsETH, which users can trade and post as collateral on Aave. However, when attackers exploited Kelp's cross-chain bridge, releasing 116,500 rsETH worth approximately $292 million, they deposited the stolen tokens onto Aave V3 as collateral and borrowed wrapped ether against them. Aave initially stated that the Umbrella reserve would cover any deficit but later softened its stance to exploring paths to offset the deficit. The concentration of Aave's loan book on Ethereum, with $14.24 billion of the $17.82 billion in outstanding borrows, and the dominance of the WETH pair, explains why the damage is so significant. 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, which can have their backing vanish due to external factors, poses a significant risk. The risk models had priced these tokens as if they would hold their peg under normal conditions, but none accounted for a scenario where the collateral's value drops to zero due to a bridge exploit on an unrelated chain. The token price is now reflecting the uncertainty surrounding whether the Umbrella reserve is sufficient to cover the hole and whether stkAAVE holders will absorb the loss.