[Aave Releases Post-Mortem Analysis of the '$50 Million Loss from Buying AAVE' Incident: Root Cause is Market Illiquidity, Not Slippage] BlockBeats News, March 15: Aave released a post-mortem analysis of the Swap incident. On March 12, 2026, a user executed a token swap operation via the CoW Swap router integrated into the Aave interface. The user attempted to swap 50,432,688 aEthUSDT (valued at approximately $50.43 million) for aEthAAVE. Due to the user's exceptionally large order in a market with insufficient liquidity, CoW Swap provided a highly unfavorable quote, which the user confirmed and accepted. It is important to note that the Aave protocol itself was never at risk, as this swap occurred outside the protocol via the aforementioned third-party Swap protocol. As of now, the user involved has not contacted the Aave team. The key issue in this incident was market illiquidity, not slippage. Illiquidity refers to the inability of the market to provide sufficient assets at a specific price to fulfill a large order, resulting in severe price deviation. The user's order far exceeded the available market liquidity, and the CoW Swap quote was 99.9% lower than the expected market clearing price. The unfavorable outcome was due to the user confirming the quote, not due to price changes during execution. The root cause of this incident was the routing of a large transaction in a market with insufficient liquidity, leading to extreme price impact. The user executed the transaction after confirming a clear warning on the interface. To prevent similar incidents, Aave will introduce 'Aave Shield' in the Swap widget: by default, swaps with price impacts exceeding 25% will be blocked, and users will need to manually disable this feature to execute high-risk transactions. The transaction generated approximately $110,368 in fees, which will be refunded to the user upon verification.