Description

NiceGUI is a Python-based UI framework. From versions 2.22.0 to 3.4.1, an unsafe implementation in the click event listener used by ui.sub_pages, combined with attacker-controlled link rendering on the page, causes XSS when the user actively clicks on the link. This issue has been patched in version 3.5.0.

INFO

Published Date :

2026-01-08T09:50:02.801Z

Last Modified :

2026-01-08T15:13:11.652Z

Source :

GitHub_M
AFFECTED PRODUCTS

The following products are affected by CVE-2026-21872 vulnerability.

Vendors Products
Zauberzeug
  • Nicegui
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-21872.

URL Resource
https://github.com/zauberzeug/nicegui/releases/tag/v3.5.0 cve-icon cve-icon
https://github.com/zauberzeug/nicegui/security/advisories/GHSA-m7j5-rq9j-6jj9 cve-icon cve-icon
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CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact