Polymarket suffered a security breach in which some user funds were stolen, prompting a trading halt and referral to U.K. authorities.

What it means

Polymarket, a platform for betting on real-world events (a prediction market), suffered a security breach on its international exchange. Hackers exploited a compromised third-party analytics tool (DebugBear) to steal user funds, reportedly around $2.7 million. The company halted trading and referred the matter to UK law enforcement, where the third-party service is based.

Accuracy & sourcesGrounded

The claim is well-supported by multiple reputable news outlets (CNBC, Reuters, Bloomberg, Wired) citing Polymarket's own statements and law enforcement referral. The details about the third-party script and the amount stolen are consistent across reports, making the core claim solid.

How new

This is a breaking story from October 29, 2026, reporting a fresh security incident; there is no indication of resurfaced material.

Go deeper

• CNBC (Top News) — first to publish