CVE-2026-112290 MI6 @ukic/canary-web-components 3.0.0-canary.12 before 3.0.0-canary.48 DOM XSS via ic-tree-item
Attackers can execute arbitrary JavaScript in browsers via DOM XSS in ic-tree-item when truncation is enabled, affecting users of the MI6 UI Kit.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-112290?
CVE-2026-112290 is a low-severity cross-site scripting vulnerability in MI6 Intelligence Community UI Kit canary web components, published on 19 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Intelligence Community UI Kit @ukic/canary-web-components 3.0.0-canary.12 before 3.0.0-canary.48 contains a DOM-based cross-site scripting vulnerability in ic-tree-item that re-parses router-item slot text as HTML. When tree item truncation is enabled, attackers who influence a tree item label can have escaped markup decoded by truncateTreeItemLabel() and executed as JavaScript in visitors' browsers.
Weakness: CWE-79
Which versions are affected by CVE-2026-112290?
How do I fix CVE-2026-112290?
No fix has been published for CVE-2026-112290 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-2026-112290 being exploited?
There is no known exploitation of CVE-2026-112290 in the wild and no public exploit code.
Sources
Also known as GHSA-w4jm-jj2f-69q8.