Wasabi Protocol Loses $4.5 Million Due to Admin Key Breach

The DeFi sector continues to experience significant losses, with Wasabi Protocol being the latest victim. On Thursday, the platform, which offers perpetuals trading 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 part of a string of DeFi losses totaling over $605 million across at least 12 incidents this month. The attack bears a striking resemblance to the Drift Protocol exploit, where a compromised admin key was used 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. A helper contract then upgraded Wasabi's perp vaults and Long Pool to malicious implementations, resulting in the draining of balances. The exploit leveraged the Universal Upgradeable Proxy Standard (UUPS), which allows a smart contract to change its underlying code while retaining the same address. However, this standard also poses a risk if an attacker gains admin permissions, as they can replace the contract's logic with malicious code designed to steal funds. 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, which involved the Wasabi: Deployer EOA granting ADMIN_ROLE to an attacker helper contract. This contract then UUPS-upgraded the perp vaults and LongPool to drain the funds. 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 had either been drained or remained at risk. This incident is part of a larger trend, with the cumulative DeFi loss total for 2026 exceeding $770 million across over 30 reported incidents. 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, leading to repeated exploits. Wasabi has not yet issued a public statement regarding the incident.