Wasabi Protocol Loses $4.5 Million Due to Admin Key Compromise

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, was drained of around $4.55 million after its deployer key was compromised, according to a report by 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. 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. 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 with zero 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. The exploit took advantage of the Universal Upgradeable Proxy Standard (UUPS), which allows a smart contract to change its underlying code while maintaining the same address. Although UUPS is widely used for its convenience in fixing bugs without migrating users, it 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. In this case, Wasabi lacked a timelock or multisig to protect the admin role, leaving a single key with 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 incident is part of a larger trend of DeFi exploits, which have resulted in cumulative losses of over $770 million across more than 30 reported incidents in 2026. The majority of these losses 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 familiar post-mortem language. Wasabi Protocol has not yet issued a public statement on the incident.