According to Polymarket vice president of engineering Josh Stevens, the incident was disclosed with assistance from blockchain investigator ZachXBT, Bitcoin Vietnam, and ChangeNOW (crypto exchange service).
Polymarket vice president of engineering Josh Stevens said a private key leak led to the freezing of $164,000 in funds. The disclosure, based on the provided source, also referenced blockchain investigator ZachXBT, Bitcoin Vietnam, and ChangeNOW (crypto exchange service). A private key leak is a serious security incident in crypto because control of wallet assets depends on exclusive access to that credential, and freezing funds can be part of an effort to limit further movement after exposure is detected.