CVE-2026-4418 IBM Cloud Pak System HTML Injection
An authenticated attacker can inject malicious HTML into IBM Cloud Pak System, leading to script execution in victims' browsers.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-4418?
CVE-2026-4418 is a medium-severity cross-site scripting vulnerability in IBM Cloud Pak System, published on 19 Oct 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
IBM Cloud Pak System 2.3.6.0, and 2.3.6.1 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.
Weakness: CWE-80
Which versions are affected by CVE-2026-4418?
How do I fix CVE-2026-4418?
No fix has been published for CVE-2026-4418 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-4418 being exploited?
There is no known exploitation of CVE-2026-4418 in the wild and no public exploit code.
Sources
Also known as GHSA-vj5c-2vfj-v63r.