CVE-2026-116486
Objenesis before 3.6 Type Confusion via Class Name Instantiator Cache
- State
- Published
- Severity
- 2.0 Low
- Published
- Oct 26, 2026
- Updated
- Oct 26, 2026
- Reserved
- Oct 26, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 2.0 Low | CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 4.5 Medium | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L | VulnCheck |
Weaknesses
- CWE-386 Symbolic Name not Mapping to Correct Object
Affected Products
| Product | Versions |
|---|---|
objenesiseasymock |
|
References
- Patch Commitpatch
- GitHub Security Advisory (GHSA-743r-26gf-97ff)vendor-advisory
- https://github.com/easymock/objenesis/blob/fb36e5c377ed1bf57a18386fa79d2eed4ddfcfac/main/src/main/java/org/objenesis/ObjenesisBase.java#L92-L95technical-description
- https://github.com/easymock/objenesisproduct
- VulnCheck Advisory: Objenesis before 3.6 Type Confusion via Class Name Instantiator Cachethird-party-advisory
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