Apache MINA 2.x insecure deserialization via IoBuffer.getObject() (before 2.0.28)
CVE-2026-41409 Published on April 27, 2026
Apache MINA: CWE-502 Deserialization of Untrusted Data
The fix for CVE-2024-52046 in Apache MINA AbstractIoBuffer.getObject() was incomplete. The classname allowlist of classes allowed to be deserialized was applied too late after a static initializer in a class to be read might already have been executed.
Affected versions are Apache MINA 2.0.0 <= 2.0.27, 2.1.0 <= 2.1.10, and 2.2.0 <= 2.2.5.
The problem is resolved in Apache MINA 2.0.28, 2.1.11, and 2.2.6 by
applying the classname allowlist earlier.
Affected are applications using Apache MINA that call IoBuffer.getObject().
Applications using Apache MINA are advised to upgrade
Vulnerability Analysis
CVE-2026-41409 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be critical as this vulnerability has a high impact to the confidentiality, integrity and availability of this component.
Weakness Type
What is a Marshaling, Unmarshaling Vulnerability?
The application deserializes untrusted data without sufficiently verifying that the resulting data will be valid.
CVE-2026-41409 has been classified to as a Marshaling, Unmarshaling vulnerability or weakness.
Products Associated with CVE-2026-41409
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Affected Versions
Apache Software Foundation Apache MINA:- Version 2.2.0, <= 2.2.5 is affected.
- Version 2.1.0, <= 2.1.10 is affected.
- Version 2.0.0, <= 2.0.27 is affected.