Haciyev Reşit 
A pricing error in Aave, one of the largest lending protocols in the DeFi sector, triggered millions of dollars in liquidations. Due to a minor configuration mismatch within the system, the Wrapped stETH token briefly appeared below its real value, leading to the forced liquidation of $26 million worth of user positions. A total of 34 user accounts were directly affected by the incident. Experts say that in DeFi protocols, price oracle systems determine collateral value, meaning even small technical errors can result in significant financial consequences. In this case, the system’s incorrect calculation of the wstETH price caused some users’ positions to be automatically liquidated.
A Small Pricing Error Triggered Major Liquidations
The Aave lending protocol determines the value of collateral used by borrowers through price oracles. If the collateral value falls below a certain threshold, the system automatically liquidates positions to protect lenders. In this event, the actual value of the collateral did not drop. However, the system miscalculated the price and treated it as if it had fallen. The issue originated from a mismatch between two internal settings in Aave’s CAPO (Capped Asset Price Oracle) security mechanism. This mechanism normally exists to limit sudden or manipulative price spikes.
However, the lack of synchronization between the two settings caused the following:
- One parameter updated only partially due to a rate limit
- The other continued operating as if it had fully updated
As a result, the system calculated the price of wstETH approximately 2.85% lower than its real value. For most users, a 2.85% difference might not be significant. But for investors borrowing close to their collateral limits or using high leverage, this small discrepancy became critical. Consequently, 10,938 wstETH across 34 accounts were automatically liquidated and sold to cover outstanding loans. According to a report by Chaos Labs, liquidation bots monitoring such opportunities generated approximately 499 ETH in profit from the event.
The Aave Protocol Did Not Suffer Financial Loss
Although the incident caused serious losses for some users, the Aave protocol itself did not suffer any financial damage. No loans remained unpaid, and the protocol’s reserves were not used. This indicates that the core risk management and liquidation mechanisms functioned as designed. Stani Kulechov, founder and CEO of Aave, commented on the situation:
“There was no impact on the Aave Protocol.”
Nevertheless, the Aave team announced that a compensation plan would be launched to cover the losses experienced by affected users. The protocol’s management stated that necessary steps would be taken to protect community trust and reimburse users.
Compensation Process for Users
Aave managed to recover part of the funds generated during the liquidation process. Through the BuilderNet refund mechanism, the protocol retrieved:
- 141.5 ETH
- 13 ETH in transaction fees
These funds will be distributed directly to the affected users. The remaining 345 ETH loss will be covered by the Aave DAO treasury, ensuring that the losses of liquidated users are fully reimbursed. Omer Goldberg confirmed that all affected users will be compensated:
“Every affected user will be fully reimbursed. The Aave DAO is finalizing the repayment plan.”
The incident highlights how even minor configuration errors in DeFi protocols can lead to significant financial consequences. Although the protocol itself did not suffer losses, the $26 million liquidation event demonstrates the critical importance of risk management systems and price oracle accuracy in decentralized finance. At the same time, Aave’s quick response and commitment to fully compensating affected users helped limit negative market reaction and maintain confidence in the protocol.
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