Wasabi Protocol Loses $4.5 Million Due to Compromised Admin Key

The DeFi space continues to experience significant losses, with Wasabi Protocol being the latest victim. The protocol, which operates as a perpetual trading platform on Ethereum and Base, was drained of approximately $4.55 million on Thursday after its deployer key was compromised, according to security firm Blockaid. This incident marks the latest in a series of DeFi losses, totaling over $605 million across at least 12 incidents in the past month. The attack bears a strong resemblance to the Drift Protocol exploit, which occurred on April 1, where North Korea-linked attackers used a compromised admin key to steal $285 million from the Solana-based perpetuals exchange. The hack 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 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 relied on 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 requiring user migration, 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 left a single key in control of the protocol, making it vulnerable to the attack. 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. The past 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 the Kelp DAO incident, where 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 the majority of these losses occurring in April. Other smaller breaches this month include CoW Swap, Grinex, Resolv Labs, and Volo Protocol, among others. A common thread among these incidents is not a new vulnerability, but rather the failure to implement lessons learned from previous exploits, leaving the DeFi space vulnerable to repeated attacks. Wasabi Protocol has not yet issued a public statement regarding the incident.