Wasabi Protocol Loses $4.5 Million Due to Compromised Admin Key

The DeFi sector continues to face significant losses, with Wasabi Protocol being the latest victim. On Thursday, the platform, which is a perpetual trading platform built 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 the latest in a series of DeFi losses totaling over $605 million across at least 12 incidents this month. The attack bears a striking resemblance to the Drift Protocol exploit on April 1, where North Korea-linked attackers used a compromised admin key to drain $285 million from the Solana-based perpetuals exchange. The breach was carried out through an externally owned account called wasabideployer.eth, which held the sole admin role in Wasabi's permission system. Once the attacker gained access to the deployer key, they granted themselves admin privileges without delay by calling grantRole on the permission contract. A helper contract then upgraded Wasabi's perp vaults and Long Pool to malicious implementations, draining the balances, as reported by Blockaid. The exploit utilized 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 migrating users, 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. Wasabi lacked a timelock or multi-signature protection for the admin role, leaving a single key with full control over the protocol. Blockaid's exploit detection system identified an ongoing admin-key compromise exploit on Wasabi Protocol across Ethereum and Base. The compromised contracts include Wasabi's wWETH, sUSDC, wBITCOIN, wPEPE, and Long Pool vaults on Ethereum, as well as its sUSDC, wWETH, sBTC, sVIRTUAL, sAERO, and sBRETT vaults on Base. Users holding Wasabi LP tokens were advised to revoke any active approvals to the vault contracts, as the underlying assets backing those tokens had either been drained or remained at risk. This month has seen a string of exploits, including the Drift Protocol breach, where attackers exploited a single-key admin setup with no governance timelock, listing a fake token as collateral and raising withdrawal limits to drain real assets in approximately 12 minutes. Three weeks later, on April 19, Kelp DAO lost $292 million when an attacker exploited a single-verifier configuration in the protocol's LayerZero bridge, releasing 116,500 unbacked rsETH that was then used as collateral to borrow real ether (ETH) from Aave. The total DeFi loss for 2026 has now surpassed $770 million across more than 30 reported incidents, with April accounting for the majority of that figure. Smaller breaches this month have hit CoW Swap ($1.2 million), Grinex ($13.74 million), Resolv Labs ($23 million), Volo Protocol ($3.5 million), among others. A common thread among these incidents is not a new vulnerability, but rather the same post-mortem language about lessons learned, only to be followed by the next exploit before the lessons are implemented. Wasabi has not yet issued a public statement on the incident.