---
id: CVE-2026-118636
title: 'Apache MINA: Unsafe Deserialization (CWE-502) in JavaNativeMessageDecoder'
summary: "**UNSUPPORTED WHEN ASSIGNED**\_\n\nJavaNativeMessageDecoder in the MINA 3.0 codec module calls ObjectInputStream.readObject() on frame bytes with no class filter, so an\napplication that puts it in front of an untrusted peer is open to gadge…"
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
cwe:
  - CWE-502
vendor: Apache Software Foundation
product: 'org.apache.mina:mina-core'
affected:
  - 'org.apache.mina:mina-core >= 3.0.0 <= 3.0.0-M2'
published: '2026-10-31'
updated: '2026-10-31'
sourceUpdated: '2026-10-31T21:08:27.192Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-118636'
references:
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-118636'
  - url: 'https://lists.apache.org/thread.html/h76nwcrkvsffhsk2kq6cjzc6srtnty7x'
tags:
  - cve.org
epss: 0.00575
epssPercentile: 0.47555
ingestedAt: '2026-11-05T18:28:50.662Z'
---

## Overview

**UNSUPPORTED WHEN ASSIGNED** 

JavaNativeMessageDecoder in the MINA 3.0 codec module calls ObjectInputStream.readObject() on frame bytes with no class filter, so an
application that puts it in front of an untrusted peer is open to gadget-chain RCE.

As the 3.0.0 branch is inactive, we do not plan to release a version that fixes this issue. 

Users are recommended to use the latest Apache MINA 2.2.X branch.

## Affected

- `org.apache.mina:mina-core >= 3.0.0 <= 3.0.0-M2`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.