Vulnerability Description
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.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/easymock/objenesis
- https://github.com/easymock/objenesis/blob/fb36e5c377ed1bf57a18386fa79d2eed4ddfc
- https://github.com/easymock/objenesis/commit/40f90f435a06b16af74a7398f0007faeaa5
- https://github.com/easymock/objenesis/security/advisories/GHSA-743r-26gf-97ff
- https://www.vulncheck.com/advisories/objenesis-before-3.6-type-confusion-via-cla
FAQ
What is CVE-2026-116486?
CVE-2026-116486 is a vulnerability with a CVSS score of 4.5 (MEDIUM). 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 shar...
How severe is CVE-2026-116486?
CVE-2026-116486 has been rated MEDIUM with a CVSS base score of 4.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-116486?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.