Polymarket Sets $3.9M Refund Plan After Third-Party Script Compromise
Polymarket says its October 29 incident involved a compromised monitoring script. Its October 30 update put total refunds at $3.9 million, including losses linked to the trading pause.
NewsBTC Editorial TeamNewsBTC · November 2, 2026 · 2h agoBrief · 1 min read
Polymarket has published a postmortem on an October 29 disruption to its international platform, which it traces to a compromised performance-monitoring script. The October 30 update lists $3.9 million in refunds overall, comprising $2.7 million connected to the attack and $1.2 million for losses from the trading pause. The company said 95% of affected wallets received full refunds as of that afternoon. The company said the script was used against some live sessions to sell holdings and shift funds. Its countermeasures included deleting the file, purging cached data, resetting sessions, and pausing trading and relayer operations for a period. The article notes the 95% figure is a point-in-time company report rather than a live completion rate.
Why it matters: It shows that website code outside a blockchain protocol can expose crypto application users, making script controls and refund accuracy relevant to readers.
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