Wasabi Protocol Loses $4.5 Million in Apparent Admin Key Breach

The decentralized finance (DeFi) space continues to experience 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 about $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, which have surpassed $605 million across at least 12 incidents this month alone. The attack bears a striking resemblance to the Drift Protocol exploit, where North Korea-linked attackers utilized a compromised admin key to drain $285 million from the Solana-based perpetuals exchange on April 1. The mechanics of the attack involved an externally owned account (EOA) 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, their helper contract upgraded Wasabi's perp vaults and Long Pool to malicious implementations, resulting in the draining of the balances, as reported by Blockaid. The exploit relied on the Universal Upgradeable Proxy Standard (UUPS), a widely used standard that allows a smart contract to change its underlying code while maintaining the same address. Although UUPS is beneficial for developers, as it enables them 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. 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, according to Blockaid. 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 a cumulative loss total of over $770 million across more than 30 reported incidents in 2026. The majority of these losses have occurred in April, with smaller breaches hitting 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 familiarity of the vulnerabilities exploited. Wasabi Protocol has not yet issued a public statement regarding the incident.