MediumMonitoringNo recent activityExploitINC-D29FBA
Polymarket $520K Exploit
Confidence87% · High
TypeExploit
Est. Loss$700.0K
Signals3
First DetectedMay 22, 2026, 9:58 AM
Last SignalMay 22, 2026, 12:23 PM
Overview
On-chain investigator ZachXBT identified suspicious transactions draining $520K from Polymarket's rewards payout system.
Over $520,000 drained from two Polymarket smart contracts on Polygon due to private key compromise; user funds safe.
Protocols
PolymarketUMA
Chains
Polygon
Assets
POL
Sources & Timeline
- NewCoinDesk90%
On-chain investigator ZachXBT identified suspicious transactions draining $520K from Polymarket's rewards payout system.
May 22, 2026, 9:39 AMRead on Bytewit → - NewCointelegraph90%
Compromised private key from a six-year-old internal top-up wallet allowed attacker to drain funds repeatedly.
May 22, 2026, 10:19 AMRead on Bytewit → - NewDecrypt80%
On-chain investigator ZachXBT flagged suspicious drain from Polymarket-linked wallet.
May 22, 2026, 12:23 PMRead on Bytewit →
