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Security Bulletin: Cross-site Scripting, HTML Injection and Use of Weak Cryptographic Algorithm vulnerabilities in IBM Cloud Pak System

Security Bulletin


Summary

Cross-site Scripting, HTML Injection and Use of Weak Cryptographic Algorithm vulnerabilities were found in Cloud Pak System[CVE-2026-3295, CVE-2023-38375, CVE-2026-3161,CVE-2026-4418]. Those vulnerabilities were addressed in IBM Cloud Pak System version 2.3.6.2.

Vulnerability Details

CVEID:   CVE-2026-4418
DESCRIPTION:   IBM Cloud Pak System is vulnerable to HTML injection. A remotely authenticated attacker could inject malicious HTML code, which when viewed, would be executed in the victim's Web browser within the security context of the hosting site.
CWE:   CWE-80: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
CVSS Source:   IBM
CVSS Base score:   5.4
CVSS Vector:   (CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N)

CVEID:   CVE-2023-38375
DESCRIPTION:   IBM Cloud Pak System is vulnerable to cross-site scripting. This vulnerability allows users to embed arbitrary JavaScript code in the Web UI thus altering the intended functionality potentially leading to credentials disclosure within a trusted session.
CWE:   CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVSS Source:   IBM X-Force
CVSS Base score:   6.1
CVSS Vector:   (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N)

CVEID:   CVE-2026-3161
DESCRIPTION:   IBM Cloud Pak System uses weaker than expected cryptographic algorithms that could allow an attacker to decrypt highly sensitive information
CWE:   CWE-327: Use of a Broken or Risky Cryptographic Algorithm
CVSS Source:   IBM
CVSS Base score:   5.9
CVSS Vector:   (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N)

CVEID:   CVE-2026-3295
DESCRIPTION:   IBM CPS (Cloud Pak System) is vulnerable to cross site scripting.  The web app user‑supplied input is not properly sanitized or HTML‑encoded before being stored and rendered.  An authenticated attacker could exploit this vulnerability by entering specially crafted payloads containing malicious JavaScript which are saved within the app and later executed automatically when  user views affected pages, resulting in Stored Cross‑Site Scripting (Stored XSS). 
CWE:   CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVSS Source:   IBM
CVSS Base score:   7.4
CVSS Vector:   (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L)

Affected Products and Versions

Affected Product(s)Version(s)
IBM Cloud Pak System2.3.6.0
IBM Cloud Pak System2.3.6.1

Remediation/Fixes

IBM strongly recommends addressing the vulnerability now by upgrading to 2.3.6.2.

This Security bulletin applies to IBM Cloud Pak System, IBM Cloud Pak System Software and  IBM Cloud Pak System Software Suite.

Information on upgrading here https://www.ibm.com/support/pages/node/7284365

 

For unsupported versions the recommendation is  to upgrade to supported version of the product.

 

Workarounds and Mitigations

None

Get Notified about Future Security Bulletins

References

Off

Acknowledgement

Change History

01 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:
01 October 2026

Initial Publish date:
01 October 2026

UID

ibm17290183