What We Know
Polymarket paused trading on its international platform after a security issue involving a third-party provider, while reports described outages beginning on October 29, 2026.3Backed by 3 sourcesAssociated Presscybersecuritynews.usrg.org Polymarket later said the issue involved a cyberattack or compromise of one of its third-party providers rather than a direct description of an attack on the platform itself.2Backed by 2 sourcestherecord.mediacybersecuritynews.us
Reports said some Polymarket user funds were stolen, and the matter was referred to authorities in the United Kingdom.1Backed by 1 sourcesCNBC A Reuters report carried by StreetInsider said Polymarket resumed trading after the breach and would reimburse users, although the supplied material does not specify the reimbursement terms.1Backed by 1 sourcesstreetinsider.com
A reproduced Polymarket statement described the issue as affecting its international platform and involving a compromised third-party provider.1Context from one sourcenews.ycombinator.com
Source Comparison
Aligned reportingCorroborates
- therecord.media↗The report's headline supports the account that Polymarket attributed the disruption to a cyberattack involving a third-party provider.
- Associated Press↗The AP headline directly supports the pause in international trading after a security issue involving a third-party provider.
- streetinsider.com↗The Reuters report supports that trading resumed after the breach and that Polymarket planned to reimburse users.
- CNBC↗The headline supports reports that some user funds were stolen and that the matter was referred to U.K. authorities.
- cybersecuritynews.us↗The report supports the October 29 outage timing, the third-party-provider attribution, and the distinction between a provider incident and a direct platform attack.
- rg.org↗The report supports that Polymarket halted trading following a breach involving a third-party provider.