{"id":"CVE-2026-88005","summary":"Open WebUI: Users denied by the OAuth domain allowlist or role policy can still sign in via token exchange","details":"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.","aliases":["GHSA-4qg5-cxx4-g927"],"modified":"2026-09-12T03:47:23.065811909Z","published":"2026-09-10T14:38:52.367Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/88xxx/CVE-2026-88005.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-863"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/88xxx/CVE-2026-88005.json"},{"type":"ADVISORY","url":"https://github.com/open-webui/open-webui/security/advisories/GHSA-4qg5-cxx4-g927"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-88005"},{"type":"FIX","url":"https://github.com/open-webui/open-webui/commit/fb5ef978bfb451c3f2221931e08e54250cec58ca"},{"type":"FIX","url":"https://github.com/open-webui/open-webui/pull/23639"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/open-webui/open-webui","events":[{"introduced":"7a7a25766c3dc13fa85544a93d011e00b7c0b2b4"},{"fixed":"fb5ef978bfb451c3f2221931e08e54250cec58ca"}],"database_specific":{"extracted_events":[{"introduced":"0.8.0"},{"fixed":"0.9.0"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-88005.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N"}]}