Security Bulletin
Summary
IBM Sterling B2B Integrator and IBM Sterling File Gateway have addressed vulnerability due to Apache MINA
Vulnerability Details
CVEID: CVE-2026-41409
DESCRIPTION: The fix for CVE-2024-52046 in Apache MINA AbstractIoBuffer.getObject() was incomplete. The classname allowlist of classes allowed to be deserialized was applied too late after a static initializer in a class to be read might already have been executed.
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
CWE: CWE-502: Deserialization of Untrusted Data
CVSS Source: security@apache.org
CVSS Base score: 9.8
CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
CVEID: CVE-2026-41635
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.
CWE: CWE-502: Deserialization of Untrusted Data
CVSS Source: security@apache.org
CVSS Base score: 9.8
CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
Affected Products and Versions
| Affected Product(s) | Version(s) |
| IBM Sterling B2B Integrator and IBM Sterling File Gateway | 6.2.0.0 - 6.2.0.6 |
| IBM Sterling B2B Integrator and IBM Sterling File Gateway | 6.2.1.0 - 6.2.1.1_2 |
| IBM Sterling B2B Integrator and IBM Sterling File Gateway | 6.2.2.0 - 6.2.2.0_1 |
Remediation/Fixes
IBM strongly recommends addressing the vulnerability now.
| Product | Version | APAR | Remediation & Fix |
| IBM Sterling B2B Integrator and IBM Sterling File Gateway | 6.2.0.0 - 6.2.0.6 | IT49373 | Apply B2Bi 6.2.0.6_1, 6.2.1.2, 6.2.2.1 |
| IBM Sterling B2B Integrator and IBM Sterling File Gateway | 6.2.1.0 - 6.2.1.1_2 | IT49373 | Apply B2Bi 6.2.1.2, 6.2.2.1 |
| IBM Sterling B2B Integrator and IBM Sterling File Gateway | 6.2.2.0 - 6.2.2.0_1 | IT49373 | Apply B2Bi 6.2.2.1 |
The IIM versions of 6.2.0.6_1, 6.2.1.2 and 6.2.2.1 are available on Fix Central.
The container version of 6.2.0.6_1, 6.2.1.2 and 6.2.2.1 are available in IBM Entitled Registry.
Workarounds and Mitigations
None
Get Notified about Future Security Bulletins
References
Acknowledgement
Change History
27 Jul 2026: Initial Publication
*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.
Disclaimer
According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES ""AS IS"" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY. In addition to other efforts to address potential vulnerabilities, IBM periodically updates the record of components contained in our product offerings. As part of that effort, if IBM identifies previously unidentified packages in a product/service inventory, we address relevant vulnerabilities regardless of CVE date. Inclusion of an older CVEID does not demonstrate that the referenced product has been used by IBM since that date, nor that IBM was aware of a vulnerability as of that date. We are making clients aware of relevant vulnerabilities as we become aware of them. "Affected Products and Versions" referenced in IBM Security Bulletins are intended to be only products and versions that are supported by IBM and have not passed their end-of-support or warranty date. Thus, failure to reference unsupported or extended-support products and versions in this Security Bulletin does not constitute a determination by IBM that they are unaffected by the vulnerability. Reference to one or more unsupported versions in this Security Bulletin shall not create an obligation for IBM to provide fixes for any unsupported or extended-support products or versions.
Document Location
Worldwide
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Document Information
Modified date:
27 July 2026
Initial Publish date:
27 July 2026
UID
ibm17281441