# CVE-2026-4418: IBM Cloud Pak System HTML injection vulnerability

Source: https://junglewise.ai/threats/cve-2026-4418-ibm-cloud-pak-system-2-3-6-0-and-2-3-6-1-is-vulnerable-to-html  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-19. Updated: 2026-10-19  
License: CC BY 4.0 with a link back

CVE-2026-4418 · Severity: medium · CVSS 5.4 · Published 2026-10-19

IBM Cloud Pak System is a cloud infrastructure management platform that allows enterprises to deploy and manage cloud applications. An authenticated attacker can inject malicious HTML code that executes in users' web browsers when they view affected pages, potentially enabling session hijacking, credential theft, or unauthorized actions within the system.

Technologies: [IBM Cloud Pak System](https://junglewise.ai/threats/technologies/cloud-pak-system). Vendors: [IBM](https://junglewise.ai/threats/vendors/ibm).

## Quick answers

**Is CVE-2026-4418 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-4418 being exploited in the wild.

**How severe is CVE-2026-4418?** Medium severity, with a CVSS score of 5.4, published 19 October 2026.

**Which products and versions are affected?** IBM Cloud Pak System 2.3.6.0, 2.3.6.1.

**Is there a fix for CVE-2026-4418?** Yes: fixed in 2.3.6.2. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-4418 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-4418?** Check whether you run IBM Cloud Pak System at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in 2.3.6.2

## Technical details

The vulnerability is an HTML injection flaw (CWE-80) in IBM Cloud Pak System versions 2.3.6.0 and 2.3.6.1 that allows a remotely authenticated attacker to inject malicious HTML/script code. The attack requires user interaction (a victim must view the page containing the injected content) and is limited in scope by the authentication requirement. A successful exploit executes arbitrary code in the victim's browser under the hosting site's security context.

## Affected products

- IBM Cloud Pak System 2.3.6.0, 2.3.6.1

## Timeline

- 2026-10-19: disclosed
- 2026-10-01: patched: Fix available in version 2.3.6.2

## References

- [https://www.ibm.com/support/pages/node/7290183](https://www.ibm.com/support/pages/node/7290183)

## Related threats

- [IBM Cloud Pak System stored cross-site scripting](https://junglewise.ai/threats/cve-2026-3295-ibm-cloud-pak-system-2-3-6-0-and-2-3-6-1-is-vulnerable-to-cross)
- [IBM Cloud Pak System weak cryptographic algorithm](https://junglewise.ai/threats/cve-2026-3161-ibm-cloud-pak-system-2-3-6-0-and-2-3-6-1-uses-weaker-than-expected)
- [IBM Cloud Pak System cross-site scripting in Web UI](https://junglewise.ai/threats/cve-2023-38375-ibm-cloud-pak-system-2-3-6-0-and-2-3-6-1-is-vulnerable-to-cross)
- [IBM Cloud Pak System information disclosure in log files](https://junglewise.ai/threats/cve-2026-13463-ibm-cloud-pak-system-information-disclosure-in-log-files)