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Specter: Multiple Polymarket Users Suspected Victims of Phishing Attack, Losses ...

Odaily.News • June 25, 2026

Odaily Odaily reports that on-chain security analyst Specter has stated that a suspected phishing attack targeting Polymarket users is underway, with cumulative losses currently estimated at approximately $2.94 million. According to their monitoring, the attacker has transferred funds from over 11 victim wallets holding PUSD, swapping the stolen assets for ETH. Specter also reminds users to be vigilant against phishing risks and notes that the incident is still being actively tracked.

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This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.

Polymarket Suffers $3M Theft from Supply-Chain Attack via Third-Party Vendor On June 25, 2026, Polymarket confirmed a security breach that led to the theft of approximately $3 million from fewer than 15 user accounts. The attack was executed through a compromised third-party vendor, which allowed hackers to inject malicious code into Polymarket's website frontend. The stolen funds primarily consisted of Polymarket's pUSD stablecoin, which were quickly converted to Ethereum (ETH) to obscure the trail. Blockchain analysts reported that over 11 wallets were affected, with the attackers consolidating the stolen assets into a single address. Polymarket has assured all impacted users that they will be fully reimbursed and has removed the compromised vendor dependency. This incident follows a previous breach in May 2026, where the platform lost approximately $700,000 due to a separate attack targeting employee wallets. The company is now facing scrutiny regarding its vendor vetting processes and security measures. 45 sources 65

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Specter: Multiple Polymarket Users Suspected Victims of Phishing Attack, Losses ...

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