{"cve":"CVE-2026-88005","nvd":{"published":"2026-09-10T15:17:55.500","modified":"2026-09-18T14:44:04.137","status":"Analyzed","description":"Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.8.0 until 0.9.0, Open WebUI's OAuth token exchange endpoint issues a session for a provider access token without applying the email domain allowlist that the normal OAuth login callback enforces. An account whose email domain the login callback would refuse could still obtain a working session through this endpoint. This issue is fixed in version 0.9.0.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","score":6.5},"cwes":["CWE-863"],"references":["https://github.com/open-webui/open-webui/commit/fb5ef978bfb451c3f2221931e08e54250cec58ca","https://github.com/open-webui/open-webui/pull/23639","https://github.com/open-webui/open-webui/security/advisories/GHSA-4qg5-cxx4-g927"],"products":["openwebui:open_webui"],"source":"nvd","synced_at":"2026-10-19T22:52:53.108888569+00:00"},"epss":{"cve":"CVE-2026-88005","score":0.00371,"percentile":0.31089,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-4qg5-cxx4-g927","url":"https://osv.dev/vulnerability/GHSA-4qg5-cxx4-g927","summary":"Open WebUI: Users denied by the OAuth domain allowlist or role policy can still sign in via token exchange","modified":"2026-10-01T17:56:19.737044182Z","packages":[{"ecosystem":"PyPI","name":"open-webui","purl":"pkg:pypi/open-webui","ranges":[">=0.8.0 <0.9.0"],"fixed":["0.9.0"]}]},{"id":"PYSEC-2026-4119","url":"https://osv.dev/vulnerability/PYSEC-2026-4119","summary":"Open WebUI: Users denied by the OAuth domain allowlist or role policy can still sign in via token exchange","modified":"2026-10-01T17:45:06.264115413Z","packages":[{"ecosystem":"PyPI","name":"open-webui","purl":"pkg:pypi/open-webui","ranges":[">=0.8.0 <0.9.0"],"fixed":["0.9.0"]}]}],"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."]}