Medium severity4.5NVD Advisory· Published Oct 26, 2026
CVE-2026-116486
CVE-2026-116486
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.
Affected products
1Patches
Vulnerability mechanics
References
4- github.com/easymock/objenesis/blob/fb36e5c377ed1bf57a18386fa79d2eed4ddfcfac/main/src/main/java/org/objenesis/ObjenesisBase.javanvd
- github.com/easymock/objenesis/commit/40f90f435a06b16af74a7398f0007faeaa52c00cnvd
- github.com/easymock/objenesis/security/advisories/GHSA-743r-26gf-97ffnvd
- www.vulncheck.com/advisories/objenesis-before-3.6-type-confusion-via-class-name-instantiator-cachenvd
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