DECRYPT · 2026-10-29 18:53 UTC

Polymarket Pauses Trading as Prediction Market Investigates Security Incident

Polymarket paused trading after users reported unauthorized asset withdrawals; the platform's trading API is in major outage and exchange is in cancel-only mode. A trader reported losing $800,000 with others also affected; researchers found malicious code in a script from DebugBear targeting logged-in users' positions and assets. A suspected attacker's wallet holds $2.65 million in POL token; Polymarket has experienced multiple security incidents including a $700,000 private key compromise in May and $3 million frontend hack in June.

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