
Polymarket Pays Out $3.9 Million After DebugBear Third-Party Script Compromise
Prediction market platform Polymarket has announced compensation totaling 3.9 million dollars to users affected by a malware incident involving a compromised third-party script. The malicious code was delivered through a performance monitoring script provided by DebugBear, which was injected into Polymarket.com and executed automatically for site visitors. Attackers used the script to target logged-in users, extracting trading positions from 726 wallets and transferring assets worth 2.7 million dollars to an attacker-controlled wallet. An additional 1.2 million dollars is being paid to owners of approximately 5,500 wallets that suffered losses due to the temporary trading suspension. Cybersecurity firm Hudson Rock identified DebugBear as the affected vendor. DebugBear later confirmed that attackers modified DNS records via the domain registrar, preventing email delivery during the incident. The attack was described as targeted at one specific customer website.
Security.NLNov 2, 2026Translated from NL
