VULNERABILITY INTELLIGENCE

CVE-2026-21872

CVSS score6.1 MEDIUM
EPSS probability0.27%
CISA KEVNot currently listed
Published2026-01-08
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

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.

Weakness classification

  • security-advisories@github.com: CWE-79

Primary references