CVE-2026-41635
CRITICALApache MINA: AbstractIoBuffer.resolveClass() null-clazz Branch Skips acceptMatchers Filter — Full Object Deserialization RCE
Title source: cnaDescription
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
CVSS v3
9.8
EPSS
0.0010
EPSS Percentile
27.8%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
total
Details
CWE
CWE-502
Status
published
Products (4)
apache/mina
2.0.0 - 2.0.28
Apache Software Foundation/Apache MINA
2.0.0 - 2.0.27
Apache Software Foundation/Apache MINA
2.1.0 - 2.1.10
Apache Software Foundation/Apache MINA
2.2.0 - 2.2.5
Published
Apr 27, 2026
Tracked Since
Apr 27, 2026