Polymarket Resumes Trading After Third-Party Breach
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AI-assisted source synthesis · not an independent investigation.
On October 30, 2026, Polymarket attributed the suspension of trading on its international platform to a breach of a third-party service provider, saying the issue had been fixed, affected users would be compensated, and the incident had been referred to law enforcement. During the investigation, the platform entered “cancel-only” mode, prohibiting the creation of new buy and sell orders, allowing existing orders to be canceled, and suspending relayer actions. Earlier reports said that an on-chain wallet suspected of belonging to the attacker had received more than $2.5 million from user accounts, involving more than 900 transactions, and that the platform expected to resume trading at 3 p.m. U.S. Eastern Time on Thursday. Subsequent reports said that the platform began restoring trading 21 minutes after the suspension, with trading fully restored six minutes later, and promised to fully compensate all affected traders; the U.S. platform was unaffected. Subsequent public data said that one account withdrew at least $2.7 million from 710 wallets; the number of affected users has not been disclosed.
AI-written from reports · updated 23 minutes ago
Developments
- Oct 30 06:44 · 1 reportsPolymarket resumes trading and promises compensationPYMNTS：Polymarket resumes trading after a third-party security incident and promises full compensation
- Oct 30 04:07 · 1 reportsPolymarket suspends trading due to a third-party intrusionFinance Magnates：Polymarket attributes trading suspension to a third-party security incident
Timeline
Follow the reporting to see the different sides of the story.
- PYMNTSPolymarket resumes trading after a third-party security incident and promises full compensation
Polymarket resumed operations after briefly suspending trading on its international platform due to a breach at a third-party vendor, and promised to fully compensate all affected traders. The company said the platform began recovering after 21 minutes, with trading fully restored 6 minutes later; Polymarket’s U.S. platform was not affected. Public data showed that one account withdrew at least $2.7 million from 710 wallets, but related reports did not disclose the number of affected users.
- Finance MagnatesPolymarket attributes trading suspension to a third-party security incident
Polymarket suspended trading on its international platform after a third-party service provider was breached, saying it has fixed the issue, will compensate affected users, and has referred the incident to law enforcement. During the investigation, the platform switched to cancel-only mode, prohibiting new buy and sell orders while allowing existing orders to be canceled, and also suspended relayer actions. On-chain activity shows that a suspected attacker wallet received more than $2.5 million from user accounts, involving more than 900 transactions. Trading is expected to resume at around 3 p.m. ET on Thursday.
Heat over time
Current heat 19·Peak over the comparable range 19 (Oct 30 07:00)·Change over the comparable range in the last 24 hours –
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