CVE-2026-116486
mediumObjenesis before 3.6 contains a type confusion vulnerability that allows code in one class loader to substitute objects into another by exploiting instantiator…
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:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/easymock/objenesis disclosure@vulncheck.com
- https://github.com/easymock/objenesis/blob/fb36e5c377ed1bf57a18386fa79d2eed4ddfcfac/main/s... disclosure@vulncheck.com
- https://github.com/easymock/objenesis/commit/40f90f435a06b16af74a7398f0007faeaa52c00c disclosure@vulncheck.com
- https://github.com/easymock/objenesis/security/advisories/GHSA-743r-26gf-97ff disclosure@vulncheck.com
- https://www.vulncheck.com/advisories/objenesis-before-3.6-type-confusion-via-class-name-in... disclosure@vulncheck.com