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

The DeFi sector continues to experience significant losses, with Wasabi Protocol being the latest victim. The platform, which operates as a perpetuals trading platform on Ethereum and Base, was drained of approximately $4.55 million on Thursday after attackers gained unauthorized access to its deployer key, according to a report by security firm Blockaid. This incident is the latest in a series of breaches that have resulted in over $605 million in DeFi losses across at least 12 incidents this month. The attack bears a striking similarity to the Drift Protocol exploit on April 1, where attackers linked to North Korea used a compromised admin key to drain $285 million from the Solana-based perpetuals exchange. The breach was made possible 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 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 that drained the balances, as reported by Blockaid. The exploit relied on the Universal Upgradeable Proxy Standard (UUPS), which enables a smart contract to change its underlying code while maintaining the same address. Although UUPS is widely used for its convenience in allowing 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. According to Blockaid, Wasabi lacked a timelock or multisig to protect the admin role, leaving a single key with full control over the protocol. A timelock would have forced a delay between the announcement and execution of an admin action, providing users with time to react, while a multisig would have required multiple signers to approve changes. The absence of these security measures made it possible for the attackers to carry out the exploit. 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 were either drained or remained at risk. The recent string of exploits has resulted in significant losses for the DeFi sector, with the cumulative total for 2026 exceeding $770 million across more than 30 reported incidents. The majority of these losses occurred in April, with smaller breaches affecting CoW Swap, Grinex, Resolv Labs, and Volo Protocol, among others. A common thread among these incidents is the lack of implementation of lessons learned from previous exploits, leaving the sector vulnerable to repeated attacks. Wasabi Protocol has not yet issued a public statement regarding the incident.