Polymarket restores trading after third-party security breach
Polymarket has restored trading on its international prediction market after a compromised external technology provider triggered unauthorised withdrawals from customer accounts, with the company promising to reimburse affected traders fully. The platform suspended trading on Thursday, 29 October, while investigating the security incident. Its official status page marked the disruption resolved…
Polymarket, an international prediction market, has resumed trading following a security breach caused by unauthorized withdrawals from customer accounts. The incident occurred on Thursday, 29 October, when Polymarket suspended trading to investigate the issue. The company later confirmed that the problem had been fixed and reimbursed affected traders.
The breach involved a third-party provider, DebugBear, which supplies website performance monitoring services. Polymarket has not publicly identified DebugBear, but the company is cooperating with law enforcement in the United Kingdom. The extent of customer losses remains unclear, with estimates ranging from $2.7 million to millions of dollars.
Polymarket has assured traders that it will make them whole, but the reimbursement process is still ongoing. The company's main platform was not directly affected, but customers reported missing balances and unauthorized withdrawals. DebugBear advised its customers to remove embedded monitoring code from their websites to mitigate the risk.
The breach highlights the importance of vetting third-party service providers when handling financial transactions.
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