Wasabi Protocol Suffers $4.5 Million Loss Due to Apparent Admin Key Breach

The DeFi sector continues to hemorrhage funds, with Wasabi Protocol being the latest casualty. On Thursday, the protocol, which operates as a perpetuals trading platform 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 that have exceeded $605 million across at least 12 incidents this month. The attack on Wasabi Protocol closely mirrors the Drift Protocol exploit that occurred on April 1, where North Korea-linked attackers utilized a compromised admin key to drain $285 million from the Solana-based perpetuals exchange. The vulnerability was exploited 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 any delay by calling grantRole on the permission contract. Subsequently, a helper contract was used to upgrade Wasabi's perp vaults and Long Pool to malicious implementations, resulting in the draining of balances, as reported by Blockaid. The exploit leveraged the Universal Upgradeable Proxy Standard (UUPS), a widely used standard that enables smart contracts to modify their underlying code without changing their address. Although UUPS allows developers to fix 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's lack of a timelock or multisig to protect the admin role was a critical factor in the exploit, as it allowed a single key to hold full control over the protocol. Blockaid's exploit detection system identified the 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, and the Kelp DAO incident, where an attacker exploited a single-verifier configuration in the protocol's LayerZero bridge. The cumulative DeFi loss total 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 also hit CoW Swap, Grinex, Resolv Labs, and Volo Protocol, among others. A common thread among these incidents is the lack of implementation of lessons learned, despite the familiar post-mortem language. Wasabi Protocol has not yet issued a public statement regarding the incident.