CVE-2026-21873
- Source
- https://cve.org/CVERecord?id=CVE-2026-21873
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-21873.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-21873
- Aliases
- Published
- 2026-01-08T09:50:23Z
- Modified
- 2026-10-21T02:56:21Z
- Severity
-
- 7.2 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N CVSS Calculator
- Summary
- Zero-click XSS in all NiceGUI apps which uses `ui.sub_pages`
- Details
-
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.
- Database specific
{ "cna_assigner": "GitHub_M", "cwe_ids": [ "CWE-79" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/21xxx/CVE-2026-21873.json" }- References
Affected packages
Git / github.com/zauberzeug/nicegui
Affected ranges
- Type
- GIT
- Repo
- https://github.com/zauberzeug/nicegui
- Events
- Database specific
-
Show details
{ "extracted_events": [ { "range": [ { "introduced": "2.22.0" }, { "fixed": "3.5.0" } ], "source": "AFFECTED_FIELD", "strategy": "StringRangeExpression" }, { "original_tag": "v3.5.0", "range": [ { "fixed": "ae20f775a683fdf8643cb8cbb35d14279b866af6" } ], "source": "REFERENCES_TAG" }, { "cpe": "cpe:2.3:a:zauberzeug:nicegui:*:*:*:*:*:*:*:*", "range": [ { "introduced": "2.22.0" }, { "fixed": "3.5.0" } ], "source": "CPE_RANGE" } ] }