Vulnerability Description
NiceGUI is a Python-based UI framework. Prior to version 3.12.0, two FastAPI routes that serve per-component static assets in NiceGUI accept a sub-path parameter that may resolve to a directory rather than a file. Requests that resolve to a directory raise an unhandled RuntimeError inside Starlette's FileResponse, which Uvicorn writes to the server log as a full traceback. Because the routes are reachable without authentication, a remote attacker can amplify log volume and consume disk and log-pipeline capacity on any publicly reachable NiceGUI server. This issue has been patched in version 3.12.0.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/zauberzeug/nicegui/releases/tag/v3.12.0
- https://github.com/zauberzeug/nicegui/security/advisories/GHSA-pq7c-x8g4-rvp6
FAQ
What is CVE-2026-45554?
CVE-2026-45554 is a vulnerability with a CVSS score of 5.3 (MEDIUM). NiceGUI is a Python-based UI framework. Prior to version 3.12.0, two FastAPI routes that serve per-component static assets in NiceGUI accept a sub-path parameter that may resolve to a directory rather...
How severe is CVE-2026-45554?
CVE-2026-45554 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-45554?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.