The $50M Aave Slippage Catastrophe: Why DeFi Frontends Are the Last Line of Defense (And They're Failing)

On March 12, 2026, a user swapped ~$50M in aEthUSDT for just 327 AAVE tokens worth ~$36K through the official Aave interface, losing 99.93% of value after the order was routed through a SushiSwap pool holding only $73K in liquidity. MEV bots sandwich-attacked the transaction, extracting ~$9.9M in profit, while the protocol and UI only presented soft warnings with a confirmable checkbox — highlighting that DeFi frontends rely on inadequate 'consent theater' instead of hard blocks against catastrophic user errors.