If you think you have discovered a security issue in Teku, we'd love to hear from you. We will take all security bugs seriously and if confirmed upon investigation we will patch it within a reasonable amount of time and release a public security bul 36A6 letin discussing the impact and credit the discoverer.
To report a security bug, email a description of the flaw and any related information (e.g. reproduction steps, version) to security-quorum@consensys.net.