CVE-2026-116486

What it is

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.

At a glance

Exploitability

Can be exploited locally on the machine with a low-privilege account. Limited direct impact.

Exploit odds

0.1% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2026-10-26 14:16 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-10-26 18:39 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 0.1% in the next 30 days (EPSS).
• Severity: 2.0 LOW (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2026-10-26 14:16 UTC

Last modified

2026-10-26 18:39 UTC

Exploit probability

0.1% · EPSS, next 30 days

Weakness

CWE-386

Record status

Awaiting Analysis

Attack profile CVSS 4.0 · 2.0

Attack vector

Local

Complexity

High

Attack requirements

Present

Privileges needed

Low

User interaction

None

Confidentiality

Low

Integrity

Low

Availability

Low

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2026-116486.md and follow it. Check whether this project is affected by CVE-2026-116486. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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