Serialized object communication is a way to package structured data, such as objects or messages, so it can be sent between systems and reconstructed on the other side. It is common in distributed software, remote administration tools, and build systems because it lets programs move complex state instead of plain text.
In security, the risk is that the receiver may trust data too much while rebuilding it. If an attacker can send crafted serialized content, the deserialization step may trigger unexpected methods, corrupt application logic, or even lead to code execution through gadget chains. Defenses include strict type validation, authenticated channels, minimizing what is serialized, and avoiding deserialization of untrusted input. In CI/CD platforms like Jenkins, this matters because controller-agent links often rely on structured remoting messages, making trust checks on serialized traffic a critical boundary.