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    CVE-2026-42779

    The fix for CVE-2026-41635 was not applied to the 2.1.X and 2.2.X branches. Here was the original issue description: Apache MINA's AbstractIoBuffer.resolveClass() contains two branches, one of them (for static classes or primitive types) does not check the class at all, bypassing the classname allowlist and allowing arbitrary code to be executed. The fix checks if the class is present in the accepted class filter before calling Class.forName(). Affected versions are Apache MINA 2.1.0 <= 2.1.11, and 2.2.0 <= 2.2.6. The problem is resolved in Apache MINA 2.1.12, and 2.2.7 by applying the classname allowlist earlier. Affected are applications using Apache MINA that call IoBuffer.getObject(). Applications using Apache MINA are advised to upgrade.

    Published:May 1, 2026
    Last Modified:May 3, 2026
    EPS:May 1, 2026
    EPSS Score:0.0019
    CVSS Score:9.8

    Affected Products

    Vendor
    Apache
    Product
    Mina

    Exploits

    https://github.com/dinosn/CVE-2026-42779

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-586 Object Injection

    Related CVEs

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    CVE-2026-42778 (CVSS 9.8) — The fix for CVE-2026-41409 was not applied to the 2.1.X and 2.2.X branches. Here was the original issue descri…
    CVE-2026-41409 (CVSS 9.8) — The fix for CVE-2024-52046 in Apache MINA AbstractIoBuffer.getObject() was incomplete. The classname allowlist…
    CVE-2026-41635 (CVSS 9.8) — Apache MINA's AbstractIoBuffer.resolveClass() contains two branches, one of them (for static classes or primit…
    CVE-2024-52046 (CVSS 10) — The ObjectSerializationDecoder in Apache MINA uses Java’s native deserialization protocol to process incoming …
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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High