ZachXBT flags $520K Polymarket exploit on Polygon, team says funds are safe
Key takeaways
- Published May 22, 2026, 9:39 a.m. 1 min read Make preferred on Zach XBT flags an exploit at Polymarket.
- Blockchain investigator ZachXBT has highlighted a suspected security breach involving Polymarket, the world’s largest decentralized prediction market platform.
- Over $520,000 was reportedly drained from two smart contracts on the Polygon blockchain, according to on-chain data shared by ZachXBT.
Published May 22, 2026, 9:39 a.m. 1 min read Make preferred on Zach XBT flags an exploit at Polymarket. (Boitumelo/Unsplash)What to know: Blockchain sleuth ZachXBT flagged a suspected security breach at Polymarket in which more than $520,000 was drained from two smart contracts on the Polygon blockchain.Polymarket developers said the incident stemmed from a private key compromise of an internal operations wallet tied to its rewards payout system, stressing that user funds and market resolutions remain safe.
Blockchain investigator ZachXBT has highlighted a suspected security breach involving Polymarket, the world’s largest decentralized prediction market platform.
Over $520,000 was reportedly drained from two smart contracts on the Polygon blockchain, according to on-chain data shared by ZachXBT. The affected addresses are 0x871D7c0f9E19001fC01E04e6cdFa7fA20f929082 and 0x91430CaD2d3975766499717fA0D66A78D814E5c5, with funds allegedly sent to attacker address 0x8F98075db5d6C620e8D420A8c516E2F2059d9B91.