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.
Analysis
No analysis available yet.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| zauberzeug | nicegui | affected |
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Remediation
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Tracking
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Advisories
| Source | ID | Title |
|---|---|---|
 Github GHSA |
GHSA-pq7c-x8g4-rvp6 | NiceGUI: Unauthenticated log-volume denial of service in dynamic resource routes |
References
History
Tue, 02 Jun 2026 15:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | NiceGUI: Unauthenticated log-flood DoS via trailing slash on ESM and per-component resource routes | |
| Weaknesses | CWE-248 CWE-770 |
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| References |
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| Metrics |
cvssV3_1
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Subscriptions
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MITRE
Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-06-02T15:35:07.125Z
Reserved: 2026-05-12T17:48:47.880Z
Link: CVE-2026-45554
Vulnrichment
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NVD
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Redhat
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OpenCVE Enrichment
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