Polymarket Halts Trading After Frontend Compromise Drains User Wallets

Polymarket, the decentralized prediction market platform, temporarily suspended all trading activity on October 29 after users reported unauthorized withdrawals from their wallets, with the platform's frontend believed to have been compromised. Reports emerged on the platform's Discord channel that assets were being drained without user permission, prompting Polymarket to restrict the platform to cancel-only mode before halting trading entirely.

Polymarket confirmed it had identified and fixed an issue tied to a compromised third-party provider, and pledged that any users affected by the unauthorized withdrawals would be made whole. The company said it halted trading out of an abundance of caution and was working to bring the platform back online fully.