Wasabi Protocol Loses $4.5 Million Due to Compromised Admin Key

The decentralized finance sector continues to experience significant losses, with Wasabi Protocol being the latest victim. On Thursday, the platform, which offers perpetual trading on Ethereum and Base, was drained of approximately $4.55 million after its deployer key was compromised, according to security firm Blockaid. This incident is part of a larger trend, with over $605 million lost in DeFi across at least 12 incidents this month alone. The attack on Wasabi Protocol bears a striking resemblance to the Drift Protocol exploit, which occurred on April 1 and resulted in the theft of $285 million from the Solana-based perpetuals exchange by North Korea-linked attackers using a compromised admin key. The Wasabi Protocol hack was carried out through an externally owned account called wasabideployer.eth, which held the sole ADMIN_ROLE in the platform's permission system. Once the attackers gained access to the deployer key, they granted themselves admin privileges without delay by calling grantRole on the permission contract. A helper contract was then used to upgrade Wasabi's perp vaults and Long Pool to malicious implementations, resulting in the drainage of the balances, as reported by Blockaid. The exploit took advantage of the Universal Upgradeable Proxy Standard (UUPS), which allows a smart contract to change its underlying code while maintaining the same address. Although UUPS is widely used for its convenience in fixing bugs without requiring user migration, it also poses a significant risk if an attacker gains control of admin permissions, as they can replace the contract's logic with malicious code designed to steal funds. A critical factor in this breach was the lack of a timelock or multisig protecting the admin role in Wasabi Protocol. The absence of these security measures meant that a single key held full control over the protocol, leaving it vulnerable to exploitation. Blockaid's exploit detection system identified the ongoing admin-key compromise exploit on Wasabi Protocol across both Ethereum and Base. The compromised contracts include various vaults on Ethereum and Base, such as wWETH, sUSDC, and wBITCOIN. Users holding Wasabi LP tokens were advised to revoke any active approvals to the vault contracts, as the underlying assets backing those tokens were either drained or remained at risk. This incident is part of a series of exploits that have plagued the DeFi sector this month, including the Drift Protocol breach, which also involved a single-key admin setup with no governance timelock, and the Kelp DAO incident, where an attacker exploited a single-verifier configuration in the protocol's LayerZero bridge. The cumulative DeFi loss for 2026 has surpassed $770 million across more than 30 reported incidents, with April accounting for the majority of these losses. Other smaller breaches this month include CoW Swap, Grinex, Resolv Labs, and Volo Protocol. Despite the repeated lessons learned from these incidents, the next exploit often occurs before the necessary security measures are implemented. Wasabi Protocol has yet to issue a public statement regarding the incident.