Security Bulletin
Summary
Multiple vulnerabilities were found in IBM Db2 LUW that affect Platform System Manager (PSM) and Db2 pattern Type (pType) shipped with IBM Cloud Pak System. Those vulnerabilities were addressed in IBM Cloud Pak System CPS 2.3.6.2.
Vulnerability Details
CVEID: CVE-2026-16480
DESCRIPTION: IBM Db2 11.5.0 through 11.5.9, and 12.1.0 through 12.1.5 is affected by an improper authorization vulnerability in the certain command, allowing a non-privileged user to bypass authority checks and modify database catalog data.
CWE: CWE-602: Client-Side Enforcement of Server-Side Security
CVSS Source: IBM
CVSS Base score: 4.3
CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N)
CVEID: CVE-2026-10543
DESCRIPTION: IBM Db2 11.5.0 through 11.5.9, and 12.1.0 through 12.1.5 is vulnerable to privilege escalation with a specially crafted query.
CWE: CWE-285: Improper Authorization
CVSS Source: IBM
CVSS Base score: 8.2
CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N)
CVEID: CVE-2026-10534
DESCRIPTION: IBM Db2 11.5.0 through 11.5.9, and 12.1.0 through 12.1.5 is vulnerable to buffer overflow in the IXF IMPORT parser.
CWE: CWE-121: Stack-based Buffer Overflow
CVSS Source: IBM
CVSS Base score: 8.4
CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
CVEID: CVE-2026-45205
DESCRIPTION: Uncontrolled Recursion vulnerability in Apache Commons.
When processing an untrusted configuration file, Commons Configuration will throw a StackOverflowError for YAML input with cycles.
This issue affects Apache Commons: from 2.2 before 2.15.0.
Users are recommended to upgrade to version 2.15.0, which fixes the issue.
CWE: CWE-674: Uncontrolled Recursion
CVSS Source: CISA ADP
CVSS Base score: 5.3
CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)
CVEID: CVE-2026-1718
DESCRIPTION: IBM Db2 11.5.0 through 11.5.9, and 12.1.0 through 12.1.4 is vulnerable to a denial of service with a specially crafted query when autonomous transactions are enabled.
CWE: CWE-770: Allocation of Resources Without Limits or Throttling
CVSS Source: IBM
CVSS Base score: 7.1
CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H)
CVEID: CVE-2026-6053
DESCRIPTION: IBM Db2 11.5.0 through 11.5.9, and 12.1.0 through 12.1.4 is vulnerable to a denial of service when a specially crafted query is run with range partitioned tables.
CWE: CWE-770: Allocation of Resources Without Limits or Throttling
CVSS Source: IBM
CVSS Base score: 5.5
CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
CVEID: CVE-2026-6052
DESCRIPTION: IBM Db2 11.5.0 through 11.5.9, and 12.1.0 through 12.1.4 is vulnerable to running out of memory when executing certain queries with MDC tables.
CWE: CWE-400: Uncontrolled Resource Consumption
CVSS Source: IBM
CVSS Base score: 6.5
CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
CVEID: CVE-2026-6051
DESCRIPTION: IBM Db2 11.5.0 through 11.5.9, and 12.1.0 through 12.1.4 is vulnerable to a denial of service when executing a specially crafted query with a small statement heap.
CWE: CWE-400: Uncontrolled Resource Consumption
CVSS Source: IBM
CVSS Base score: 5.5
CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
CVEID: CVE-2025-13755
DESCRIPTION: IBM Db2 11.5.0 through 11.5.9, and 12.1.0 through 12.1.4 for Linux, UNIX and Windows (includes DB2 Connect Server) stores potentially sensitive information in log files that could be read by a local user.
CWE: CWE-532: Insertion of Sensitive Information into Log File
CVSS Source: IBM
CVSS Base score: 5.5
CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N)
Affected Products and Versions
| Affected Product(s) | Version(s) (Power) |
| IBM Cloud Pak System | 2.3.5.0 |
| IBM Cloud Pak System | 2.3.5.1 |
| Affected Product(s) | Version(s) (Intel) |
| IBM Cloud Pak System | 2.3.6.0 |
| IBM Cloud Pak System | 2.3.6.1 |
Remediation/Fixes
IBM strongly recommends addressing these vulnerabilities now by upgrading to IBM Cloud Pak System v2.3.6.2
IBM Cloud Pak System 2.3.6.2 provide Platform System Manager (PSM) with DB2 support update to DB2 v11.5.9.0 special_87984.
List of the Security vulnerabilities reported in IBM Db2 11.5.9 can be found at,
https://www.ibm.com/support/pages/published-security-vulnerabilities-db2-linux-unix-and-windows-including-special-build-information
For IBM Cloud Pak System DB2 pattern type (db2 pType) shipped with Cloud Pak System, apply
IBM Db2 11.5.9 Special Build 87984 for Instructions on how to apply the Db2 fix pack in IBM Cloud Pak System see References.
This Security Bulletin applies to IBM Cloud Pak System, IBM Cloud Pak System Software, IBM Cloud Pak System Software Suite.
Information on upgrading here https://www.ibm.com/support/pages/node/7284365
For unsupported versions the IBM recommends upgrading to a supported version.
Workarounds and Mitigations
None
Get Notified about Future Security Bulletins
References
For IBM Cloud Pak System 2.3.6,
For IBM Cloud Pak System Software 2.3.5,
Acknowledgement
Change History
06 Oct 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:
06 October 2026
Initial Publish date:
06 October 2026
UID
ibm17291391