Polymarket Sets $3.9M Refund Plan After Compromised Script Incident
The prediction market said its October 29 incident involved a compromised third-party monitoring script, with refunds totalling $3.9 million.

Polymarket has outlined a refund plan worth $3.9 million after an incident on October 29 that the prediction market platform attributes to a compromised third-party monitoring script.
In an update published on October 30, the platform put the total value of refunds at $3.9 million. That figure includes losses connected to a pause in trading that followed the incident, according to the company's statement.
What the platform has disclosed
- The incident occurred on October 29.
- Polymarket says the cause was a compromised third-party monitoring script.
- The refund total, disclosed on October 30, stands at $3.9 million.
- The figure covers losses tied to the trading pause as well as the incident itself.
The disclosure frames the event around a single external component rather than the platform's core trading systems, though Polymarket has not said in this update which provider supplied the script or how the compromise occurred.
Prediction markets have grown quickly over the past year, and incidents involving third-party tooling put attention on how such platforms monitor and secure the outside services they depend on. Polymarket's refund commitment is one of the more concrete figures attached to an operational incident in the sector so far.