{"id":"CVE-2026-45554","state":"PUBLISHED","title":"NiceGUI: Unauthenticated log-flood DoS via trailing slash on ESM and per-component resource routes","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.","publishedAt":"2026-06-02T15:35:07.125Z","updatedAt":"2026-06-02T18:03:46.033Z","severity":{"score":5.3,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","source":"GitHub_M"},"assigner":"GitHub_M","products":["zauberzeug nicegui"],"affected":[{"vendor":"zauberzeug","product":"nicegui","versions":[{"version":"< 3.12.0","status":"affected"}]}],"references":["https://github.com/zauberzeug/nicegui/security/advisories/GHSA-pq7c-x8g4-rvp6","https://github.com/zauberzeug/nicegui/releases/tag/v3.12.0"],"weaknesses":["CWE-248","CWE-770"],"ingestedAt":"2026-10-29T20:12:07.131Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/45xxx/CVE-2026-45554.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-45554","state":"PUBLISHED","datePublished":"2026-06-02T15:35:07.125Z","dateUpdated":"2026-06-02T18:03:46.033Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-05-12T17:48:47.880Z"},"containers":{"cna":{"title":"NiceGUI: Unauthenticated log-flood DoS via trailing slash on ESM and per-component resource routes","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"zauberzeug","product":"nicegui","versions":[{"version":"< 3.12.0","status":"affected"}]}],"references":[{"url":"https://github.com/zauberzeug/nicegui/security/advisories/GHSA-pq7c-x8g4-rvp6","name":"https://github.com/zauberzeug/nicegui/security/advisories/GHSA-pq7c-x8g4-rvp6","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/zauberzeug/nicegui/releases/tag/v3.12.0","name":"https://github.com/zauberzeug/nicegui/releases/tag/v3.12.0","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":5.3,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-248","lang":"en","description":"CWE-248: Uncaught Exception","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-770","lang":"en","description":"CWE-770: Allocation of Resources Without Limits or Throttling","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-06-02T15:35:07.125Z"},"source":{"advisory":"GHSA-pq7c-x8g4-rvp6","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-02T18:03:28.396030Z","id":"CVE-2026-45554","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-06-02T18:03:46.033Z"}}]}}}