CVE-2026-116486 Objenesis before 3.6 Type Confusion via Class Name Instantiator Cache
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-116486?
CVE-2026-116486 is a low-severity vulnerability in easymock objenesis, published on 26 Oct 2026.
Official 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.
Weakness: CWE-386
Which versions are affected by CVE-2026-116486?
How do I fix CVE-2026-116486?
Upgrade to a fixed version.
Is CVE-2026-116486 being exploited?
There is no known exploitation of CVE-2026-116486 in the wild and no public exploit code.
Sources
Also known as AZL-111112, DEBIAN-CVE-2026-116486, GHSA-743r-26gf-97ff, GHSA-h635-rrqm-4mjq, UBUNTU-CVE-2026-116486.