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 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 most recent in a string of DeFi losses, which have surpassed $605 million across at least 12 incidents this month. 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 vulnerability was exploited through an externally owned account called wasabideployer.eth, which held the sole admin role in Wasabi's permission system. Once the attackers gained access to the deployer key, they granted themselves admin privileges without any delay by calling grantRole on the permission contract. A helper contract was then 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), which enables a smart contract to modify its underlying code while retaining the same address. Although UUPS is widely used for its ability to allow 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, 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 month has seen a series of exploits, including the Drift Protocol breach, where attackers exploited a single-key admin setup with no governance timelock, and Kelp DAO, which lost $292 million when an attacker exploited a single-verifier configuration in the protocol's LayerZero bridge. The cumulative DeFi loss total for 2026 has now exceeded $770 million across more than 30 reported incidents, with April accounting for the majority of that figure. Other smaller breaches this month include CoW Swap, Grinex, Resolv Labs, and Volo Protocol. A common thread among these incidents is the lack of implementation of lessons learned, with each exploit producing similar post-mortem language. Wasabi has not yet issued a public statement regarding the incident.