Understanding the Commons Collections 1 Deserialization Chain
Environment Setup
The CC1 gadget chain was patched in JDK 8u71 and later. Therefore, we need a JDK version prior to that. This analysis uses JDK 8u66. To obtain the required source files (especially for sun.reflect.annotation.AnnotationInvocationHandler), follow these steps:
Download the vulnerable JDK version from this OpenJDK changeset and e ...
Posted on Tue, 07 Jul 2026 17:25:29 +0000 by mpower