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CVE-2026-47065 — Vulnerability in org.apache.mina:mina-core — CVE...

CRITICAL

Apache MINA: Critical Deserialization Allow-list Bypass via resolveProxyClass

Published June 3, 2026Updated September 10, 2026Source: osv

Summary

ZDRES-232: resolveProxyClass Not Overridden - acceptMatchers Filter Bypass via java.lang.reflect.Proxy Assessment: Fully addressed. When the serialised stream contains a TC_PROXYCLASSDESC (the marker for a java.lang.reflect.Proxy ), JDK’s ObjectInputStream.readProxyDesc() is dispatched. JDK then calls the default ObjectInputStream.resolveProxyClass(interfaces) implementation, which performs Class.forName(intf, false, latestUserDefinedLoader()) for EACH interface name and constructs the proxy class — bypassing the accepted classes list . ZDRES-233: Class.forName(name, initialize=true, classLoader) in readClassDescriptor Triggers Static Initialiser of Allow-Listed Classes Assessment: Fully addressed. For ANY class on the allow-list, deserialising a stream that names it triggers the class’s (static initialiser) BEFORE any instance is constructed. This means an attacker who supplies a class name on the allow-list (e.g., the developer wrote accept(“com.myapp.*") , attacker supplies com.myapp.SomeClass ) causes <clinit> of SomeClass — and many real-world classes have side-effecting static initialisers Both issues have been fixed.

Advisory Timeline

  • First published June 3, 2026 (131 days ago).
  • Last revised September 10, 2026 — 99 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Maven
Update org.apache.mina:mina-core to 2.0.29 or later
<!-- Update pom.xml dependency version to 2.0.29 for org.apache.mina:mina-core -->
Maven
Update org.apache.mina:mina-core to 2.1.13 or later
<!-- Update pom.xml dependency version to 2.1.13 for org.apache.mina:mina-core -->
Maven
Update org.apache.mina:mina-core to 2.2.8 or later
<!-- Update pom.xml dependency version to 2.2.8 for org.apache.mina:mina-core -->

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (3)

Affects 1 ecosystem: maven (1).

PackageEcosystemAffectedFixed In
org.apache.mina:mina-core
maven
1.0.0, 1.0.1, 1.0.10, 1.0.2 (+51 more)2.0.29
org.apache.mina:mina-core
maven
2.1.0, 2.1.1, 2.1.10, 2.1.11 (+9 more)2.1.13
org.apache.mina:mina-core
maven
2.2.0, 2.2.1, 2.2.2, 2.2.3 (+4 more)2.2.8

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

  • CWE-502
    Deserialization of Untrusted DataMITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 9.8 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Frequently Asked Questions

What is CVE-2026-47065?
Apache MINA: Critical Deserialization Allow-list Bypass via resolveProxyClass This vulnerability has been assigned a severity rating of CRITICAL (CVSS score: 9.8/10).
How do I check if my project is affected by CVE-2026-47065?
CVE-2026-47065 affects org.apache.mina:mina-core. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2026-47065 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
9.8

Exploitation is straightforward and causes maximum impact. Patch immediately.

Also Known As

GHSA-v3pr-hxpr-mfm8

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