Skibidi Java – The Infinite Loop in Java Collections; Edge Case to Java Universal DoS   

This report ("SkibidiJava") documents a DoS vulnerability in Java's core collections where circular references (for example, an ArrayList containing itself used as a HashMap key) cause infinite recursion and a StackOverflowError when deserialized; the document provides PoC code, describes real-world attack surfaces (untrusted deserialization of java.util types), and recommends mitigations such as input validation, class allowlisting, and custom deserializers to detect circular references.