Wasabi Protocol Loses $4.5 Million Due to Admin Key Breach

The decentralized finance sector continues to suffer significant losses, with Wasabi Protocol being the latest victim. On Thursday, the platform, which operates as a perpetuals trading platform on Ethereum and Base, was drained of around $4.55 million after its deployer key was compromised, according to security firm Blockaid. This incident is the latest in a string of DeFi losses, which have exceeded $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 utilized a compromised admin key to steal $285 million from the Solana-based perpetuals exchange. The attackers gained control through an externally owned account called wasabideployer.eth, which held the sole admin role in Wasabi's permission system. Once in control, they granted themselves admin privileges without delay by calling grantRole on the permission contract and then upgraded Wasabi's perp vaults and Long Pool to malicious implementations, resulting in the draining of balances. The exploit leveraged the Universal Upgradeable Proxy Standard, which allows a smart contract to change its underlying code while retaining the same address. Although this standard is widely used for its convenience in fixing bugs without migrating users, it poses a significant risk if an attacker gains admin permissions, as they can replace the contract's logic with malicious code designed to steal funds. Blockaid noted that Wasabi lacked a timelock or multisig to protect the admin role, leaving a single key with full control over the protocol. 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 were either drained or remained at risk. This incident is part of a larger trend, with the cumulative DeFi loss total for 2026 surpassing $770 million across over 30 reported incidents, the majority of which occurred in April. Other notable breaches this month include CoW Swap, Grinex, Resolv Labs, and Volo Protocol, all of which were linked by the common thread of exploiting known vulnerabilities without timely implementation of lessons learned.