The key facts

  • Trading on Polymarket's international platform was suspended for about an hour on October 30
  • The incident is linked to the UK-registered third-party service DebugBear
  • Polymarket stated that affected users will be fully compensated

What happened

The prediction platform Polymarket on Thursday temporarily suspended trading on its international venue after a security incident involving a third-party contractor, Anadolu reports, citing The Washington Post. Trading was halted for about an hour after reports that funds had been withdrawn from some users' crypto wallets, causing concern in the platform's official Discord community.

The companies' response

Polymarket placed the international platform in 'cancel-only' mode: users could cancel already executed trades but could not place new orders. The company stated that all affected users 'will be made whole.' According to a source familiar with the situation who spoke to The Washington Post, the problem is linked to DebugBear, a third-party performance monitoring and debugging service; Polymarket reported the incident to the UK authorities, where the service is registered. On the social network X, DebugBear confirmed that it was aware of the incident, was treating it as a top priority, had brought in cyber incident response specialists, and would work directly with affected clients.

What remains unknown

The reports do not provide data on the amount of funds withdrawn, the number of affected wallets, or the exact mechanism of the attack. It is also unclear when trading was fully resumed: only the one-hour suspension and the platform's switch to cancel-only mode are known. The compensation statement remains, for now, a company promise rather than a confirmed fact of payouts.