Riskcovery

CVE-2026-41635

Apache MINA: AbstractIoBuffer.resolveClass() null-clazz Branch Skips acceptMatchers Filter — Full Object Deserialization RCE

State
Published
Severity
9.8 Critical
Published
Apr 27, 2026
Updated
Apr 28, 2026
Reserved
Apr 21, 2026

Read the record on cve.org

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 2.0.0 <= 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.

Scores

CVSSScoreVectorSource
3.19.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hapache

Weaknesses

  • CWE-502 Deserialization of Untrusted Data

Affected Products

ProductVersions
Apache MINAApache Software Foundation
  • 2.2.0 through 2.2.5Affected
  • 2.1.0 through 2.1.10Affected
  • 2.0.0 through 2.0.27Affected

References

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