CVE-2026-21872
CVSS v3
6.1
MEDIUM
EPSS Score
0.3 %
exploit probability, as of 2026-10-19
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Get an alert for each new CVE published for nicegui.
Affected and fixed versions
Packages from OSV.dev and products from the vendors' CSAF advisories.
version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.
Packages
- niceguiPyPIfrom 2.22.0 · fixed in 3.5.0
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.
Technical details
- Published
- 2026-01-08
Frequently asked questions
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.