Attackers drain more than $520,000 from Polymarket contract

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 community alert and pointed to a compromised deployer address as the likely entry point for the attack. The drain played out across a short...