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CVE-2026-21873

Zero-click XSS in all NiceGUI apps which uses `ui.sub_pages` PUBLISHED

Description (CNA)

NiceGUI is a Python-based UI framework. From versions 2.22.0 to 3.4.1, an unsafe implementation in the pushstate event listener used by ui.sub_pages allows an attacker to manipulate the fragment identifier of the URL, which they can do despite being cross-site, using an iframe. This issue has been patched in version 3.5.0.

Affected (CNA)

Vendor / productVersions
zauberzeug / niceguiaffected >= 2.22.0, < 3.5.0

CWE

CWE-79

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.