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

Aave has experienced a massive exodus of $6.6 billion in deposits, and it's not due to a direct hack on the protocol. The total value locked in Aave dropped from $26.4 billion on April 18 to approximately $20 billion by Sunday morning, according to DefiLlama. The AAVE token price fell 16% to $92, while daily fees surged to $1.99 million as liquidations swept through the weekend. Depositors are fleeing because Aave is shouldering a burden it didn't create. When attackers drained 116,500 rsETH from Kelp's bridge on Saturday, they utilized the stolen tokens as collateral on Aave V3 to borrow wrapped ether. On-chain trackers estimate that Aave's borrow amount is around $196 million, with total positions across Aave, Compound, and Euler totaling approximately $236 million. Aave is the largest lending protocol in DeFi, where users deposit cryptocurrency to earn yields, and others borrow against collateral. Kelp is a liquid restaking protocol that takes already-staked ether on Ethereum and routes it through a separate yield-generating system called EigenLayer, issuing a receipt token, rsETH, in exchange. That rsETH is what users trade, and some users posted it on Aave as collateral to borrow against. On Saturday, attackers tricked Kelp's cross-chain bridge into releasing 116,500 rsETH, worth around $292 million, to a controlled address. They then deposited the stolen rsETH onto Aave V3 as collateral and borrowed wrapped ether against it. A bridge is a blockchain-based tool that enables token transfers between networks that may not originally support them. Aave initially stated that the Umbrella reserve would cover any deficit, but by Saturday afternoon, the language had shifted 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, explains why the damage is significant. WETH accounts for 39.49% of all loans on the protocol, meaning the attack targeted the exact collateral-to-WETH pair that dominates Aave's book. Stani Kulechov, Aave's founder, stated that the exploit was external and the protocol's contracts were not compromised. However, Aave accepted a liquid restaking token as collateral, and that token's backing vanished on a bridge Aave does not control. Depositors are at risk of losing either way. Liquid restaking tokens were whitelisted across major lending protocols because they offered yields and represented a growing share of Ethereum's locked value. Risk models priced them as if they would hold peg under normal conditions, but none of them accounted for a scenario where the collateral becomes worthless due to a bridge exploit on a chain Aave does not control. The token price is now attempting to determine whether the Umbrella reserve is sufficient to cover the hole and whether stkAAVE holders who back that reserve will absorb the loss.