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

Aave has witnessed a staggering $6.6 billion exodus, and it's not due to a direct hack on the platform. The protocol's total value locked plummeted from $26.4 billion on April 18 to nearly $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 because Aave is shouldering a burden it didn't create. When attackers drained 116,500 rsETH from Kelp's bridge on Saturday, they dumped the stolen tokens on Aave V3 as collateral and borrowed wrapped ether against them. On-chain trackers estimate the Aave-specific borrow to be around $196 million, with total positions across Aave, Compound, and Euler totaling approximately $236 million. Aave, the largest lending protocol in DeFi, allows users to deposit crypto to earn yield, while others borrow against collateral. Kelp, a liquid restaking protocol, takes ether already staked 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, crucially, what some users posted on Aave as collateral to borrow against. On Saturday, attackers tricked Kelp's cross-chain bridge into releasing 116,500 rsETH, worth approximately $292 million, to an address they controlled. 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 by Saturday afternoon, the language had softened to 'exploring paths to offset the deficit.' The concentration of damage is 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, meaning the attack targeted the exact collateral-to-WETH pair that dominates Aave's book. Stani Kulechov, Aave's founder, noted 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 every major lending protocol because they carried yield 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 accounted for a scenario where the collateral goes to zero due to a bridge exploit on a chain Aave does not control. The token price is now trying to determine whether Umbrella is sufficient to cover the hole and whether stkAAVE holders who back that reserve will absorb the loss.