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

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 to nearly $20 billion, with the AAVE token experiencing a 16% decline to $92. Daily fees surged to $1.99 million as liquidations swept through the weekend. Depositors are fleeing due to Aave's unforeseen liability. Attackers drained 116,500 rsETH from Kelp's bridge and used the stolen tokens as collateral on Aave V3 to borrow wrapped ether. On-chain trackers estimate the Aave-specific borrow to be approximately $196 million, with total positions across Aave, Compound, and Euler reaching $236 million. Aave, the largest DeFi lending protocol, allows users to deposit crypto to earn yield, while others borrow against collateral. Kelp, a liquid restaking protocol, routes staked ether through a separate yield-generating system, issuing an rsETH receipt token. This rsETH is tradable and was used as collateral on Aave. On Saturday, attackers exploited Kelp's cross-chain bridge, 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 concentration of damage is attributed to Aave's loan book, which spans 22 chains, with Ethereum holding $14.24 billion of the $17.82 billion in outstanding borrows. WETH accounts for 39.49% of all loans on the protocol, making it the dominant collateral-to-WETH pair. Stani Kulechov, Aave's founder, 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 led to unforeseen risks. The token's backing vanished due to a bridge exploit on a chain Aave does not control, leaving depositors vulnerable to losses. Liquid restaking tokens were whitelisted across major lending protocols due to their yield and representation of Ethereum's locked value. Risk models priced them under normal conditions, but none accounted for a scenario where the collateral becomes worthless due to a bridge exploit. The AAVE token price now reflects concerns over whether the Umbrella reserve is sufficient to cover the deficit and whether stkAAVE holders will absorb the loss.