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The Wall Street JournalView source article

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Polymarket suspends trading after $2.65 million security breach

Prediction market platform Polymarket halted international trading after a compromised third-party provider led to approximately $2.65 million being drained from user accounts. The platform resumed trading hours later and pledged to reimburse affected users.

Oct 29, 2026·5 sourcesOnchain prediction marketsCrypto securityCrypto hacksCrypto prediction marketsWallet & key compromise
Polymarket suspends trading after $2.65 million security breach
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Polymarket Sends $3.9M Back to Traders After Vendor Script Drain

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Polymarket suffers second multimillion-dollar security breach in just four months

The Washington Post

Polymarket pauses international trading after outside vendor’s security issue

Bloomberg

Polymarket Stops Trades Following Security Breach, Cites User Losses