Wasabi Protocol Loses $4.5 Million in Suspected 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 following a breach of its deployer key, as reported by security firm Blockaid. This incident marks the latest in a series of DeFi losses exceeding $605 million across at least 12 incidents in the past month. The attack bears a striking resemblance to the Drift Protocol exploit, where attackers utilized a compromised admin key to steal $285 million from the Solana-based perpetuals exchange. The breach was facilitated through an externally owned account known as wasabideployer.eth, which held the sole admin role in Wasabi's permission system. Upon gaining access to the deployer key, the attackers granted themselves admin privileges without delay by invoking the grantRole function on the permission contract. Subsequently, a helper contract was used to upgrade Wasabi's perp vaults and Long Pool to malicious implementations, thereby draining the balances, according to 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 bug fixing 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. Notably, Wasabi lacked a timelock or multi-signature protection for the admin role, leaving a single key in control of the protocol. The absence of these security measures allowed the attacker to execute the exploit without hindrance. Blockaid's exploit detection system identified the ongoing admin-key compromise exploit on Wasabi Protocol across Ethereum and Base, involving the Wasabi Deployer EOA, which granted the ADMIN_ROLE to an attacker helper contract that then UUPS-upgraded the perp vaults and LongPool to malicious implementations. The compromised contracts include various vaults on both Ethereum and 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 incident is part of a larger trend of exploits in the DeFi sector, with cumulative losses exceeding $770 million across over 30 reported incidents in 2026. The recurring theme among these incidents is the exploitation of known vulnerabilities, highlighting the need for enhanced security measures to prevent such breaches.