{"id":"CVE-2026-88005","title":"Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform","summary":"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 allow…","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","cwe":["CWE-863"],"vendor":"openwebui","product":"open_webui","affected":["open_webui >= 0.8.0, < 0.9.0"],"patched":["open_webui 0.9.0"],"published":"2026-09-10","updated":"2026-09-18","sourceUpdated":"2026-09-18T14:44:04.137","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-88005","references":[{"url":"https://github.com/open-webui/open-webui/commit/fb5ef978bfb451c3f2221931e08e54250cec58ca","label":"security-advisories@github.com"},{"url":"https://github.com/open-webui/open-webui/pull/23639","label":"security-advisories@github.com"},{"url":"https://github.com/open-webui/open-webui/security/advisories/GHSA-4qg5-cxx4-g927","label":"security-advisories@github.com"}],"tags":["nvd","cve.org"],"epss":0.00217,"epssPercentile":0.1235,"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-09-15T14:35:22.183673Z"},"ingestedAt":"2026-09-12T15:55:07.018Z","slug":"CVE-2026-88005","body":"## Overview\n\nOpen 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.\n\n## Affected\n\n- `open_webui >= 0.8.0, < 0.9.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `open_webui 0.9.0`","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}