CVE-2026-45554
Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
02/06/2026
Last modified:
02/06/2026
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.
Impact
Base Score 3.x
5.30
Severity 3.x
MEDIUM