Bug 2560717 (CVE-2026-116486) - CVE-2026-116486 org.objenesis/objenesis: objenesis: Type confusion via instantiator cache collisions
Summary: CVE-2026-116486 org.objenesis/objenesis: objenesis: Type confusion via instan...
Keywords:
Status: NEW
Alias: CVE-2026-116486
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
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Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-10-26 14:14 UTC by OSIDB Bzimport
Modified: 2026-10-26 15:27 UTC (History)
42 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-10-26 14:14:00 UTC 
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.
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