A Polymarket security incident drained more than $520,000 in collateral from the platform’s UMA CTF Adapter contract on Polygon on May 22, 2026. On-chain investigator ZachXBT flagged the incident in a ...

Here is how the exploit happened on the world’s largest prediction markets: We’re aware of the security reports linked to rewards payout. Looking into the details, the hacker then siphoned 5,000 POL ...