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

The decentralized finance sector continues to experience significant losses, with Wasabi Protocol being the latest victim, losing approximately $4.55 million on Thursday due to a compromised deployer key, according to security firm Blockaid. This incident is the latest in a string of DeFi losses, totaling over $605 million across 12 incidents this month. The attack bears a striking resemblance to the Drift Protocol exploit on April 1, in which North Korea-linked attackers used a compromised admin key to drain $285 million from the Solana-based perpetuals exchange. The attack was made possible through an externally owned account called wasabideployer.eth, which held the sole ADMIN_ROLE in Wasabi's permission system. This account is controlled by a private key, allowing the holder to exert full control over the wallet. Once the attacker gained access to the deployer key, they swiftly granted themselves admin privileges by calling grantRole on the permission contract, resulting in zero delay. A helper contract was then utilized to upgrade Wasabi's perp vaults and Long Pool to malicious implementations, effectively draining the balances, as reported by Blockaid. The exploit leveraged the Universal Upgradeable Proxy Standard (UUPS), a widely used standard that enables smart contracts to modify their underlying code while retaining the same address. Although UUPS allows 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. In this case, 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 an ongoing admin-key compromise exploit on Wasabi Protocol across Ethereum and Base. The Wasabi: Deployer EOA was used to grant ADMIN_ROLE to an attacker helper contract, which then UUPS-upgraded the perp vaults and LongPool to malicious contracts. 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, according to Blockaid. 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, listing a fake token as collateral and raising withdrawal limits to drain real assets in approximately 12 minutes. On April 19, Kelp DAO lost $292 million when an attacker exploited a single-verifier configuration in the protocol's LayerZero bridge, releasing 116,500 unbacked rsETH that was then used as collateral to borrow real ether (ETH) from Aave. The cumulative DeFi loss total for 2026 has now surpassed $770 million across more than 30 reported incidents, with April accounting for the majority of this figure. Other smaller breaches this month include CoW Swap ($1.2 million), Grinex ($13.74 million), Resolv Labs ($23 million), and Volo Protocol ($3.5 million), among others. A common thread among these incidents is not a new vulnerability, but rather the same post-mortem language about lessons learned, only to be followed by another exploit before the lessons can be implemented. Wasabi has yet to issue a public statement regarding the incident. UPDATE (April 30, 11:34 UTC): General edits have been made throughout, and the Drift Protocol exploit has been moved to the third paragraph.