The Ruby programming language is impacted by a similar "deserialization issue" that has affected and wreaked havoc in the Java ecosystem in 2016; an issue that later also proved to be a problem ...

Serialization refers to the process of saving an object’s state as a sequence of bytes and conversely, deserialization is the process of rebuilding those bytes back into an object.

Old and new deserialization exploits. In programming, serialization is the process of converting data into a stream of bytes, usually to transmit it over the wire.