CVE-2026-116486

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 v3 4.5 MEDIUM

4.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.0 / Impact : 3.4

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://github.com/easymock/objenesis
https://github.com/easymock/objenesis/blob/fb36e5c377ed1bf57a18386fa79d2eed4ddfcfac/main/src/main/java/org/objenesis/ObjenesisBase.java#L92-L95
https://github.com/easymock/objenesis/commit/40f90f435a06b16af74a7398f0007faeaa52c00c
https://github.com/easymock/objenesis/security/advisories/GHSA-743r-26gf-97ff
https://www.vulncheck.com/advisories/objenesis-before-3.6-type-confusion-via-class-name-instantiator-cache

Configurations

No configuration.

History

26 Oct 2026, 14:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-26 14:16

Updated : 2026-10-26 18:39

NVD link : CVE-2026-116486

Mitre link : CVE-2026-116486

CVE.ORG link : CVE-2026-116486

JSON object : View

Products Affected

No product.

CWE

CWE-386

Symbolic Name not Mapping to Correct Object

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