{"cve":"CVE-2026-45666","nvd":{"published":"2026-05-15T22:16:56.057","modified":"2026-06-17T10:52:26.420","status":"Analyzed","description":"Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.8.11, the API /api/v1/notes/{note_id} endpoint lacks proper authorization checks, allowing authenticated users to retrieve notes belonging to other users by guessing or enumerating UUIDs. This results in unauthorized disclosure of potentially sensitive or private user data. This vulnerability is fixed in 0.8.11.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","score":6.5},"cwes":["CWE-639"],"references":["https://github.com/open-webui/open-webui/security/advisories/GHSA-x3qm-p8hr-3c3h","https://github.com/open-webui/open-webui/security/advisories/GHSA-x3qm-p8hr-3c3h"],"products":["openwebui:open_webui"],"source":"nvd","synced_at":"2026-10-19T22:35:16.954578616+00:00"},"epss":{"cve":"CVE-2026-45666","score":0.00277,"percentile":0.20208,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-x3qm-p8hr-3c3h","url":"https://osv.dev/vulnerability/GHSA-x3qm-p8hr-3c3h","summary":"Open WebUI has an Indirect Object Reference (IDOR) in user notes","modified":"2026-07-13T16:43:37.931243466Z","packages":[{"ecosystem":"PyPI","name":"open-webui","purl":"pkg:pypi/open-webui","ranges":["<0.8.11"],"fixed":["0.8.11"]}]},{"id":"PYSEC-2026-2768","url":"https://osv.dev/vulnerability/PYSEC-2026-2768","summary":"Open WebUI has an Indirect Object Reference (IDOR) in user notes","modified":"2026-07-13T16:32:05.744251406Z","packages":[{"ecosystem":"PyPI","name":"open-webui","purl":"pkg:pypi/open-webui","ranges":["<0.8.11"],"fixed":["0.8.11"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}