- A crypto user destroyed a $50.4 million position, receiving roughly $36,000 in return after triggering over 99% slippage.
- The massive order was routed through the CoW Protocol against shallow liquidity pools, allowing automated arbitrage systems to capture the multi-million-dollar price dislocation.
- Aave founder Stani Kulechov confirmed the user manually bypassed interface warnings on a mobile device, explicitly acknowledging the extreme slippage risk.
In decentralized markets, a warning prompt is often the only thing standing between a trader and total financial ruin. On Thursday, one user clicked past that prompt and watched roughly $50 million vanish in a single transaction. The venue was Aave, a decentralized lending protocol operating on the Ethereum network. The catalyst was a staggering miscalculation of market depth.
Blockchain data outlines the exact mechanics of the trade. The wallet attempted to swap exactly $50,432,688 worth of aEthUSDT an interest-bearing token representing Tether’s USDT stablecoin deposited into the Aave protocol. The target asset was aEthAAVE, a similar version of Aave’s governance tokens.
The order was routed through the CoW Protocol. However, it was executed against trading pools with incredibly thin liquidity.
The Brutal Math of Slippage
When a trader forces an unusually large order against a shallow liquidity pool in decentralized finance (DeFi), the underlying math immediately turns against them. In this instance, the transaction executed with more than 99% slippage.
As a result of this extreme price impact, the wallet was left holding only about 327 aEthAAVE tokens. After the trade settled, those tokens were worth roughly $36,000.
The remaining tens of millions of dollars did not disappear into the ether. Automated arbitrage systems and network intermediaries quickly captured the difference in value. In DeFi, these systems are built to rapidly exploit the exact type of price dislocations created by massive, ill-advised trades.
Bypassing the Protocols
In the aftermath, attention shifted from the blockchain infrastructure to the user interface. How does an application allow a swap that destroys 99% of the user’s capital?
Stani Kulechov, the founder of the Aave protocol, clarified that the trade processed strictly because the user manually bypassed multiple failsafes before confirming the transaction.
“Earlier today, a user attempted to buy AAVE using $50M USDT through the Aave interface,” Kulechov stated in an X post. “Given the unusually large size of the single order, the interface warned the user about extraordinary slippage and required confirmation via a checkbox.”
According to Kulechov, the individual accepted the warning on their mobile device. They proceeded with the trade by explicitly acknowledging the high slippage risk.
“The transaction could not be moved forward without the user explicitly accepting the risk,” he said. Kulechov added that the CoW Swap routers functioned precisely as intended and followed standard industry practices.
A $600,000 Consolation
Despite the routing infrastructure working as programmed, Kulechov noted the outcome was “clearly far from optimal.” Aave plans to contact the affected user and return roughly $600,000 in fees collected from the transaction.
This catastrophic swap adds to a volatile week for the protocol. The loss comes just days after a separate incident where about $27 million was liquidated on Aave. According to some market participants, those earlier liquidations may have been caused by a temporary pricing issue involving the wstETH token.
Gemini said
The $27 million liquidation cascade on Aave wasn’t triggered by a market crash, a malicious hack, or even a failure of the core price feeds. Instead, it was an infrastructure misfire a security mechanism that accidentally turned into an executioner.
Here is the technical breakdown of how a minuscule pricing error dismantled eight figures worth of positions in a matter of hours.
The CAPO Misconfiguration
The root cause of the liquidations traces back to an internal safety module called the Capped Asset Price Oracle (CAPO). Aave uses CAPO specifically to defend against price manipulation and inflation attacks on yield-bearing assets like wrapped staked Ether (wstETH).
To function, CAPO relies on smart contract parameters that restrict how quickly an asset’s price can update. Recently, a severe misalignment occurred between a stored snapshot ratio and its associated timestamp.
When the system attempted to update the wstETH exchange rate, an on-chain constraint bottlenecked the adjustment. The timestamp updated, but the price ratio lagged. This synchronization failure caused the CAPO oracle to calculate a maximum allowable exchange rate that was approximately 2.85% below the actual on-chain market price for wstETH.
E-Mode and the 2.85% Death Spiral
In standard decentralized lending, a 2.85% price deviation is noise. A healthy collateralized debt position easily absorbs that variance. However, Aave offers a feature called High-Efficiency Mode, or “E-Mode.”
E-Mode allows users to borrow highly correlated assets with extreme leverage. Because the underlying assets normally move in lockstep, the protocol permits much tighter liquidation thresholds. When CAPO artificially undervalued wstETH by 2.85%, it immediately pushed a batch of heavily leveraged, otherwise healthy E-Mode positions under the safety line.
On-chain liquidation bots, which constantly monitor network mempools for undercollateralized debt, executed their programming flawlessly. They forcibly liquidated 34 accounts holding approximately 10,938 wstETH.
Protocol Health and Reimbursement
From a purely structural standpoint, the Aave protocol operated exactly as coded. It swiftly closed positions it believed were risky and incurred zero bad debt in the process.
“A technical misconfiguration resulted in the liquidation of positions that were already close to their liquidation thresholds,” noted Aave founder Stani Kulechov following the event.
The financial burden of the error fell entirely on the users, who collectively lost around 345 ETH to liquidator bonuses and arbitrage. Chaos Labs, Aave’s risk management partner, has since manually realigned the oracle parameters. The firm confirmed that all affected users will be fully compensated, utilizing recovered builder refunds alongside the Aave DAO treasury to cover the gap.
