Wasabi Protocol Loses $4.5 Million Due to Compromised Admin Key

The DeFi sector continues to experience significant losses, with Wasabi Protocol being the latest victim. On Thursday, the platform, which is a perpetuals trading platform built on Ethereum and Base, suffered a loss of about $4.55 million after its deployer key was compromised, according to a report by security firm Blockaid. This incident follows a series of DeFi losses totaling over $605 million across at least 12 incidents in the past month. The attack bears a striking resemblance to the Drift Protocol exploit, which occurred on April 1 and saw North Korea-linked attackers use a compromised admin key to drain $285 million from the Solana-based perpetuals exchange. The mechanics of the attack involved 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. Subsequently, their helper contract upgraded 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 allows smart contracts to change their underlying code while maintaining the same address. Although UUPS enables developers to fix bugs without migrating users, it also poses a risk if an attacker gains control of admin permissions, as they can replace the contract's logic with malicious code designed to steal funds. Notably, Wasabi lacked a timelock or multisig to protect the admin role, leaving a single key in control of the protocol. Blockaid's exploit detection system identified the ongoing admin-key compromise exploit on Wasabi Protocol across Ethereum and Base, where the Wasabi: Deployer EOA was used to grant ADMIN_ROLE to an attacker helper contract, which then UUPS-upgraded the perp vaults and LongPool to malicious implementations. 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 incident is part of a larger trend of DeFi exploits, with April alone accounting for the majority of the cumulative DeFi loss total for 2026, which has now surpassed $770 million across more than 30 reported incidents. Other notable breaches this month include CoW Swap, Grinex, Resolv Labs, and Volo Protocol, among others. A common thread among these incidents is the exploitation of existing vulnerabilities, with each incident producing similar post-mortem language about lessons learned, but the next exploit often occurs before these lessons are implemented. Wasabi has not yet issued a public statement regarding the incident.