- Dedaub identified a coding flaw as the root cause of the Cetus decentralized exchange hack.
- Attackers manipulated the exchange’s liquidity parameters, draining around $223 million in tokens on May 22.
- Validators on the Sui network froze $163 million of stolen assets on the same day.
- The freezing of funds sparked criticism from decentralization advocates for perceived centralization.
- Industry voices warn that crypto platforms must improve security and safeguards before regulation steps in.
A security breach hit the Cetus decentralized exchange on May 22, leading to a loss of around $223 million after attackers used a coding exploit to manipulate the platform’s liquidity settings. The hack took advantage of a flaw in Cetus’s automated market maker (AMM) system, which failed to properly check values due to a weak “overflow” test.
According to a report by blockchain security firm Dedaub, hackers exploited a vulnerability in the most significant bits (MSB) check within the code. This let them artificially increase their liquidity inputs, allowing them to establish unusually large positions with minimal tokens.
The firm wrote: “This allowed them to add massive liquidity positions with just one unit of token input, subsequently draining pools collectively containing hundreds of millions of dollars worth of tokens.” In response, Cetus and the Sui Foundation worked with validators and ecosystem partners to freeze $163 million of the stolen assets within hours of the hack.
The decision to freeze assets has led to controversy in the crypto community. Some users argued that the actions of Sui network validators — who can block or reverse blockchain transactions — represent “censorship” and centralization, which go against the decentralized principles on which platforms like Cetus are based. One user wrote on social media: “This completely undermines the principles of decentralization and transforms the network into nothing more than a centralized, permissioned database.”
Industry leaders continue to urge crypto projects to improve their security measures proactively. They argue that more robust defenses could prevent similar incidents and avoid stricter interventions from regulators in the future. Additional coverage and discussion of defender responses, including Cetus’ recovery plan, can be found here.
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