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Polymarket paused international trading after a vendor breach

Original title: Polymarket Halted International Trading After Hackers Drained Accounts

Hacker News · securityby vinyl7 ()2 min read1
Part of a story covered by 7 sourcesPolymarket restores trading after third-party script drains walletsMerged summary & timeline
AI summary · x-ai/grok-4.7Summaries by Vani AI

A UK third-party provider was breached; trading resumed and Polymarket says affected traders will be refunded.

Polymarket halted its flagship international prediction market after hackers drained some traders’ wallets through a compromised third-party vendor in the United Kingdom, not the site itself. Trading resumed after several hours, UK law enforcement was notified, and the company said impacted traders will be made whole. Polymarket US was not affected. Bubblemaps estimated about 700 users and roughly $2.7 million stolen; Polymarket declined to confirm those figures.

Unconfirmed: The roughly 700 users and $2.7 million figure comes from Bubblemaps and was not confirmed by Polymarket.

Key facts
  • This follows a June 2026 breach that the company said cost traders over $2 million.
  • Polymarket US, its US-regulated exchange, was not impacted.
  • Polymarket would not say how many traders or how much money was lost.
  • The company raised $1 billion in August 2026 and is valued at $21 billion.
Security assessment · AI, from the article

Impact: Trader wallet funds stolen via a third-party vendor

Analyze this story with Vani AIImpact, who is affected and what defenders should do, in a new chat

From the original article

2 min read at wired.com

The company says an unnamed third-party provider was compromised. Trading has resumed, and Polymarket says affected traders will be made whole. Trading has resumed on Polymarket’s flagship international platform after a hack that drained money from the wallets of some traders.

Hacker News · security

By vinyl7 · wired.com

Read the full article at Hacker News · security

A short excerpt; the article and its images belong to the publisher. Summary, key facts and assessment above are AI-written from the article and can be wrong.