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Polymarket Hack: $2.7M Vanishes in Third-Party Breach
30 Oct
Summary
- A UK third-party vendor breach impacted Polymarket's international platform.
- Approximately $2.7 million was stolen, affecting around 700 users.
- Polymarket US users were unaffected by the security incident.
Trading has resumed on Polymarket's primary international platform following a hack that compromised a UK-based third-party vendor. This security incident led to the theft of approximately $2.7 million from the cryptocurrency wallets of about 700 users. Law enforcement in the United Kingdom has been notified.
The breach did not affect users on Polymarket US, a separate platform operating within the United States under federal regulation. The flagship platform, a cryptocurrency-based prediction market, is banned in the U.S. and other countries.
This marks another security setback for Polymarket, which experienced a similar breach in June 2026, resulting in over $2 million in losses. The company, launched in 2020, has also faced controversy regarding alleged insider trading incidents.
Polymarket recently secured $1 billion in funding in August 2026, led by 1789 Capital, and is now valued at $21 billion.
