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

Aave witnessed a staggering $6.6 billion exodus, not due to a direct hack, but as a result of a security breach in the Kelp protocol. The total value locked in Aave dropped from $26.4 billion to nearly $20 billion, with the AAVE token experiencing a 16% decline to $92 and daily fees surging to $1.99 million amidst widespread liquidations. Depositors are fleeing due to Aave's indirect exposure to the Kelp hack, where attackers siphoned off 116,500 rsETH, valued at approximately $292 million, and used them as collateral to borrow wrapped ether on Aave V3. This has left Aave grappling with a potential $196 million bad debt. As the largest lending protocol in DeFi, Aave enables users to deposit cryptocurrency to earn yield, while others borrow against collateral. The Kelp protocol, a liquid restaking platform, issues rsETH tokens, which some users posted as collateral on Aave. However, when attackers exploited Kelp's cross-chain bridge, releasing the stolen rsETH, they subsequently deposited it on Aave V3, borrowing 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 loss. The concentration of Aave's loan book on Ethereum, with $14.24 billion of the $17.82 billion in outstanding borrows, has exacerbated the damage. Stani Kulechov, Aave's founder, acknowledged that the exploit was external and the protocol's contracts were not compromised. Nevertheless, 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's value would plummet to zero due to a bridge exploit on an unrelated chain. The incident has highlighted the fragility of the DeFi system, with the AAVE token price now reflecting the uncertainty surrounding the Umbrella reserve's ability to cover the losses and the potential consequences for stkAAVE holders.