Polymarket Trading Disrupted After User Report & #036;2.6M in losses - Polymarket is temporarily restricted from trading after a security incident draining millions of user accounts, originating from a compromised external service. The platform went into cancel-only mode, allowing users to remove orders but not make new trades, while the issue is investigated. Polymarket has confirmed that it will refund the merchants and fix the identified vulnerabilities, referring to the law enforcement material.