Apache MINA 3.0 JavaNativeMessageDecoder ObjectInputStream RCE
CVE-2026-118636 Published on October 31, 2026
Apache MINA: Unsafe Deserialization (CWE-502) in JavaNativeMessageDecoder
**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.
Vulnerability Analysis
CVE-2026-118636 is exploitable 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-2026-118636 has been classified to as a Marshaling, Unmarshaling vulnerability or weakness.
Products Associated with CVE-2026-118636
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Affected Versions
Apache Software Foundation Apache MINA:- Version 3.0.0, <= 3.0.0-M2 is affected.