A third-party provider was compromised and some Polymarket users lost money to hackers, according to a tweet from the betting site. The company has not confirmed how much was lost, although independent X observers suggest it could be around $3 million.
“This morning we discovered that a third-party vendor had been compromised, injecting a malicious script into our interface for some users. We have contained it and removed the affected dependency,” Polymarket wrote on X. “We are contacting affected users and refunding them in full.”
An X account that claimed there were approximately “$3 million in losses” was the response from Polymarket’s chief experience officer, William LeGate, who tweeted: “We are refunding affected users in full, there are no ‘losses’ of users.” And while that’s not exactly confirmation that it’s $3 million, it’s hard not to conclude that the amount lost at the hands of hackers was in the millions.
LeGate responded to another X account that tweeted about the hackers, saying: “Estimated losses of $2.94 million so far.” That account, which monitors blockchain transactions, claims there are at least 11 victims who had PUSD, Polymarket’s stablecoin, emptied from their wallets. It was then exchanged for Ethereum to launder the cryptocurrency, according to the account, which provided wallet addresses for the allegedly stolen funds.
It appears there may be a phishing attack targeting Polymarket users, with estimated losses of $2.94 million so far.
The attacker drained funds from more than 11 victim wallets containing PUSD, exchanged the stolen assets for ETH, and consolidated the profits to the following address:… pic.twitter.com/6WfS0JhdDG
– Specter (@SpecterAnalyst) June 25, 2026
Addressing that account, LeGate insisted“We have resolved the issue and will refund the full amount to affected users.”
Polymarket has been at the top of social media this week after an ad featuring music producer Rick Rubin received praise from names like CNBC. Andrew Ross Sorkin.
It’s rare that an ad stops me these days. This one stopped me in my tracks. Whatever your opinion on prediction markets (and this is not an endorsement), the team behind this ad created something truly extraordinary. 👏👏👏 https://t.co/4EdgTfubEh
—Andrew Ross Sorkin (@andrewrsorkin) June 24, 2026
The company desperately needed this praise after a recent investigation by the Wall Street Journal discovered that social media has been flooded with misleading videos that appear to show people making large amounts of money on Polymarket. The creators were paid to make it look like they had made hundreds of thousands of dollars, but it wasn’t real. Polymarket reportedly made “near perfect copies of their website” where creators could make fake transactions and appear to win. But none of that was real.
Polymarket did not immediately respond to emailed questions Thursday about hackers who may have taken $3 million. Gizmodo will update this article when we hear back.
