ZachXBT flags suspected exploit involving Polymarket's UMA adapter contract on Polygon

Polymarket's UMA CTF Adapter contract may have been exploited on Polygon, with roughly $520,000 reportedly drained from two related addresses, according to an alert from onchain investigator ZachXBT published Friday on his official Telegram channel.

Polymarket has not confirmed the incident. The Block reached out to Polymarket and UMA for comment.

The UMA CTF Adapter connects UMA's Optimistic Oracle with the Gnosis Conditional Tokens framework used for market resolution on Polymarket.

ZachXBT identified an address tied to the suspected exploit on Polygon as 0x8F980...d9B91. PolygonScan labels one related address as "Polymarket Adapter Exploiter 1." The related contract referenced in the alert is “0x91430...4E5c5.” According to ZachXBT, two related addresses appear to have been drained, including “0x871D7...29082” and “0xf61e3...94805.”

Polymarket is a prediction market platform that lets users wager on the outcome of real-world events using cryptocurrency.