CVE Catalog

CVE-2026-116486

MediumCVSS 4.5
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.14%

3th percentile - higher than 3% of all known CVEs

Summary

Objenesis before 3.6 contains a type confusion vulnerability that allows code in one class loader to substitute objects into another by exploiting instantiator caching keyed on class name. When a shared ObjenesisStd instance caches instantiators by clazz.getName() in ObjenesisBase.getInstantiatorOf(), same-named classes collide, causing newInstance() to return wrong-class objects and ClassCastException failures.

Risk Assessment

This may lead to application failures or bypass of class loader boundaries, potentially enabling unexpected behavior in multi-classloader environments. Risk applies to Java applications using Objenesis with multiple class loaders.

Recommendation

Upgrade Objenesis to version 3.6 or later. Review Java applications using Objenesis in environments with multiple class loaders.

Related vulnerabilities

Original NVD description (English source)

Objenesis before 3.6 contains a type confusion vulnerability that allows code in one class loader to substitute objects into another by exploiting instantiator caching keyed on class name. When a shared ObjenesisStd instance caches instantiators by clazz.getName() in ObjenesisBase.getInstantiatorOf(), same-named classes collide, causing newInstance() to return wrong-class objects and ClassCastException failures.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS