EUVD-2026-26493
GHSA-vf5j-865m-mq7c
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
4Blast Radius
ecosystem impact- 32 maven packages depend on org.apache.mina:mina-core (14 direct, 18 indirect)
Ecosystem-wide dependent count for version 2.1.0.
DescriptionNVD
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.
AnalysisAI
Remote unauthenticated code execution in Apache MINA 2.1.0-2.1.11 and 2.2.0-2.2.6 allows attackers to bypass class allowlist protections via unsafe deserialization. The vulnerability exists because the fix for CVE-2026-41635 was not backported to the 2.1.X and 2.2.X branches, leaving AbstractIoBuffer.resolveClass() susceptible to arbitrary class instantiation when applications call IoBuffer.getObject(). …
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RemediationAI
Within 24 hours: inventory all applications using Apache MINA 2.1.X or 2.2.X branches and identify those calling IoBuffer.getObject(). Within 7 days: upgrade to Apache MINA 2.3.0 or later if available; if unavailable, isolate affected systems from untrusted network sources and disable MINA deserialization features where possible. …
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