Exploiting Java Deserialization with the URLDNS Gadget Chain
Analysis of the URLDNS Exploitation Chain
Chain Exploitation Method
Gadget sequence:
HashMap.readObject()
HashMap.putVal()
HashMap.hash()
URL.hashCode()
This chain leverages classes within Java's standard library without requiring third-party dependencies or specific JDK versions. The vulnerability originates from HashMap's deserialization im ...
Posted on Mon, 28 Sep 2026 16:56:38 +0000 by maddogandnoriko