Security Bulletin
Summary
WmServiceMock is bundled with IBM webMethods Integration Server. Remediation steps are provided below (CVE-2026-12118)
Vulnerability Details
CVEID: CVE-2026-12118
DESCRIPTION: IBM webMethods Integration could allow an unauthenticated remote attacker to execute arbitrary code on the system due to the deserialization of untrusted data.
CWE: CWE-502: Deserialization of Untrusted Data
CVSS Source: IBM
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 webMethods Integration (on prem) | 10.15, 10.11 |
Remediation/Fixes
No product patch or software update is required.
Background:
The WmServiceMock package relies on Integration Server authentication and does not implement a separate authentication mechanism. This package is a development-time testing utility designed exclusively for development and testing environments.
Required Action:
Remove the WmServiceMock package from any production Integration Server node. The package should not be deployed on internet-facing or production systems.
Steps to Remove the WmServiceMock Package:
1. Log in to Integration Server
2. Navigate to Packages > Management
3. Locate the WmServiceMock package in the package list
4. Click the "Delete" icon next to WmServiceMock
5. Confirm the deletion when prompted
6. Restart the Integration Server to complete the removal
For Development/Testing Environments Only:
If you must retain WmServiceMock for development or testing purposes:
1. Ensure the package is deployed only in isolated, non-production environments
2. Verify Integration Server authentication is enabled:
- Navigate to Server > Ports in Integration Server
- Review port security settings and client certificate handling
- Confirm authentication is enforced for all ports
3. For detailed security configuration, refer to:
- Integration Server Security: Integration Server Security - IBM Documentation
- Configuring Port Security: Configuring How Ports Handle Client Certificates - IBM Documentation
Important: The WmServiceMock package should not be exposed to internet-facing networks or deployed in production systems.
Workarounds and Mitigations
None
Get Notified about Future Security Bulletins
References
Acknowledgement
Change History
02 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:
02 July 2026
Initial Publish date:
02 July 2026
UID
ibm17278857