{"id":"CVE-2026-45554","summary":"NiceGUI: Unauthenticated log-flood DoS via trailing slash on ESM and per-component resource routes","details":"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.","aliases":["GHSA-pq7c-x8g4-rvp6","PYSEC-2026-2680"],"modified":"2026-08-04T11:49:12.871927439Z","published":"2026-06-02T15:35:07.125Z","database_specific":{"cwe_ids":["CWE-248","CWE-770"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45554.json","cna_assigner":"GitHub_M"},"references":[{"type":"WEB","url":"https://github.com/zauberzeug/nicegui/releases/tag/v3.12.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45554.json"},{"type":"ADVISORY","url":"https://github.com/zauberzeug/nicegui/security/advisories/GHSA-pq7c-x8g4-rvp6"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-45554"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/zauberzeug/nicegui","events":[{"introduced":"0"},{"fixed":"0a98a671bf7bb21ad96a7fb2c8a639f1142efc0a"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"3.12.0"}],"source":"AFFECTED_FIELD"}}],"versions":["v3.11.1","v3.11.0","v3.10.0","v3.9.0","v3.8.0","v3.7.1","v3.7.0","v3.6.1","v3.6.0","v3.5.0","v3.4.1","v3.4.0","v3.3.1","v3.3.0","v3.2.0","v3.1.0","v3.0.4","v3.0.3","v3.0.2","v3.0.1","v3.0.0","v2.24.2","v2.24.1","v2.24.0","v2.23.3","v2.23.2","v2.23.1","v2.23.0","v2.22.1","v2.22.0","v2.21.0","v2.20.0","v2.19.0","v2.18.0","v2.17.0","v2.16.1","v2.16.0","v2.15.0","v2.14.1","v2.14.0","v2.13.0","v2.12.1","v2.12.0","v2.11.1","v2.11.0","v2.10.1","v2.10.0","v2.9.1","v2.9.0","v2.8.1","v2.8.0","v2.7.0","v2.5.0","v2.4.0","v2.3.0","v2.2.0","v2.1.0","v2.0.1","v2.0.0","v1.4.37","v1.4.36","v1.4.35","v1.4.34","v1.4.33","v1.4.32","v1.4.31","v1.4.30","v1.4.29","v1.4.28","v1.4.27","v1.4.26","v1.4.25","v1.4.24","v1.4.23","v1.4.22","v1.4.21","v1.4.20","v1.4.19","v1.4.18","v1.4.17","v1.4.16","v1.4.15","v1.4.14","v1.4.13","v1.4.12","v1.4.11","v1.4.10","v1.4.9","v1.4.8","v1.4.7","v1.4.6","v1.4.5","v1.4.4","v1.4.3","v1.4.2","v1.4.1","v1.4.0","v1.3.16","v1.3.15","v1.3.14","v1.3.13","v1.3.12","v1.3.11","v1.3.10","v1.3.9","v1.3.8","v1.3.7","v1.3.6","v1.3.5","v1.3.4","v1.3.2","v1.3.1","v1.3.0","v1.2.6","v1.2.5","v1.2.4","v1.2.3","v1.2.2","v1.1.11","v1.1.10","v1.1.9","v1.1.8","v1.1.7","v1.1.6","v1.1.5","v1.1.4","v1.1.3","v1.1.2","v1.1.1","v1.1.0","v1.0.10","v1.0.9","v0.9.26","v1.0.8","v1.0.7","v1.0.6","v1.0.5","v1.0.4","v1.0.3","v1.0.2","v1.0.1","v1.0.0","v0.9.25","v0.9.24","v0.9.22","v0.9.21","v0.9.20","v0.9.19","v0.9.18","v0.9.17","v0.9.16","v0.9.15","v0.9.14","v0.9.13","v0.9.12","v0.9.11","v0.9.10","v0.9.9","v0.9.8","v0.9.7","v0.9.6","v0.9.5","v0.9.4","v0.9.3","v0.9.2","v0.9.1","v0.9.0","v0.8.16","v0.8.15","v0.8.14","v0.8.13","v0.8.12","v0.8.11","v0.8.10","v0.8.9","v0.8.8","v0.8.4","v0.8.3","v0.8.2","v0.8.1","v0.8.0","v0.7.28","v0.7.27","v0.7.26","v0.7.25","v0.7.24","v0.7.23","v0.7.22","v0.7.21","v0.7.20","v0.7.19","v0.7.18","v0.7.17","v0.7.16","v0.7.15","v0.7.14","v0.7.13","v0.7.12","v0.7.11","v0.7.10","v0.7.9","v0.7.8","v0.7.7","v0.7.6","v0.7.5","v0.7.4","v0.7.3","v0.7.2","v0.7.1","v0.7.0","v0.6.13","v0.6.12","v0.6.11","v0.6.10","v0.6.9","v0.6.8","v0.6.7","v0.6.6","v0.6.5","v0.6.4","v0.6.3","v0.6.2","v0.6.1","v0.6.0","v0.5.9","v0.5.8","v0.5.7","v0.5.6","v0.5.5","v0.5.4","v0.5.2","v0.5.1","v0.5.0","v0.4.15","v0.4.14","v0.4.13","v0.4.12","v0.4.11","v0.4.10","v0.4.9","v0.4.8","v0.4.7","v0.4.6","v0.4.5","v0.4.4","v0.4.3","v0.4.2","v0.4.1","v0.4.0","v0.3.9","v0.3.8","v0.3.7","v0.3.6","v0.3.5","v0.3.4","v0.3.3","v0.3.2","v0.2.15","v0.2.14","v0.2.13","v0.2.12","v0.2.4","v0.2.10","v0.2.9","v0.2.8","v0.2.7","v0.2.6","v0.2.5","v0.2.3","v0.2.2","v0.2.1","v0.2.0","v0.1.2"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-45554.json"}}],"schema_version":"1.8.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"}]}