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

The DeFi sector continues to experience significant losses, with Wasabi Protocol being the latest casualty. On Thursday, the platform, which is built on Ethereum and Base and offers perpetuals trading, 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 exceeding $605 million across at least 12 incidents this month. The attack bears a striking resemblance to the Drift Protocol exploit on April 1, where North Korea-linked attackers utilized a compromised admin key to drain $285 million from the Solana-based perpetuals exchange. The breach was carried out 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 delay by calling grantRole on the permission contract. Subsequently, their helper contract upgraded Wasabi's perp vaults and Long Pool to malicious implementations, draining the 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 convenience in fixing bugs without migrating users, it has a significant drawback: if an attacker gains control of admin permissions, they can replace the contract's logic with any code, including that designed to steal funds. Unfortunately, Wasabi lacked a timelock or multisig to protect the admin role, leaving a single key in control of the entire protocol. Blockaid's exploit detection system identified an 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 Kelp DAO's loss of $292 million due to 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 alone accounting for the majority of that figure. Smaller breaches this month have affected CoW Swap, Grinex, Resolv Labs, and Volo Protocol, among others. A common thread among these incidents is not a new vulnerability but rather the repetition of similar post-mortem lessons without implementation before the next exploit occurs. Wasabi has not yet released a public statement regarding the incident.