CVE-2026-45675

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-45675", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-05-12T21:59:25.666Z", "datePublished": "2026-05-15T19:12:57.665Z", "dateUpdated": "2026-06-18T21:08:01.248Z"}, "containers": {"cna": {"title": "Open WebUI: LDAP and OAuth First-User Race Condition Allows Multiple Admin Accounts", "problemTypes": [{"descriptions": [{"cweId": "CWE-269", "lang": "en", "description": "CWE-269: Improper Privilege Management", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-362", "lang": "en", "description": "CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/open-webui/open-webui/security/advisories/GHSA-h3ww-q6xx-w7x3", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/open-webui/open-webui/security/advisories/GHSA-h3ww-q6xx-w7x3"}, {"name": "https://github.com/open-webui/open-webui/pull/23626", "tags": ["x_refsource_MISC"], "url": "https://github.com/open-webui/open-webui/pull/23626"}, {"name": "https://github.com/open-webui/open-webui/commit/96a0b3239b1aadb23fc359bf10849c9ba12fd6ec", "tags": ["x_refsource_MISC"], "url": "https://github.com/open-webui/open-webui/commit/96a0b3239b1aadb23fc359bf10849c9ba12fd6ec"}], "affected": [{"vendor": "open-webui", "product": "open-webui", "versions": [{"version": "< 0.9.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-06-18T21:08:01.248Z"}, "descriptions": [{"lang": "en", "value": "Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, the LDAP and OAuth authentication flows use a TOCTOU (Time-of-Check-Time-of-Use) pattern for first-user admin role assignment. The regular signup handler (signup_handler in auths.py, line 663) was explicitly patched to prevent this race with the comment \"Insert with default role first to avoid TOCTOU race\", but the LDAP and OAuth code paths were never updated with the same fix. This vulnerability is fixed in 0.9.0."}], "source": {"advisory": "GHSA-h3ww-q6xx-w7x3", "discovery": "UNKNOWN"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-05-19T03:55:45.762046Z", "id": "CVE-2026-45675", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-19T13:06:22.017Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-45675", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-05-19T03:55:45.762046Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-15T20:20:23.584Z"}}], "cna": {"title": "Open WebUI: LDAP and OAuth First-User Race Condition Allows Multiple Admin Accounts", "source": {"advisory": "GHSA-h3ww-q6xx-w7x3", "discovery": "UNKNOWN"}, "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.1, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}}], "affected": [{"vendor": "open-webui", "product": "open-webui", "versions": [{"status": "affected", "version": "< 0.9.0"}]}], "references": [{"url": "https://github.com/open-webui/open-webui/security/advisories/GHSA-h3ww-q6xx-w7x3", "name": "https://github.com/open-webui/open-webui/security/advisories/GHSA-h3ww-q6xx-w7x3", "tags": ["x_refsource_CONFIRM"]}, {"url": "https://github.com/open-webui/open-webui/pull/23626", "name": "https://github.com/open-webui/open-webui/pull/23626", "tags": ["x_refsource_MISC"]}, {"url": "https://github.com/open-webui/open-webui/commit/96a0b3239b1aadb23fc359bf10849c9ba12fd6ec", "name": "https://github.com/open-webui/open-webui/commit/96a0b3239b1aadb23fc359bf10849c9ba12fd6ec", "tags": ["x_refsource_MISC"]}], "descriptions": [{"lang": "en", "value": "Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, the LDAP and OAuth authentication flows use a TOCTOU (Time-of-Check-Time-of-Use) pattern for first-user admin role assignment. The regular signup handler (signup_handler in auths.py, line 663) was explicitly patched to prevent this race with the comment \"Insert with default role first to avoid TOCTOU race\", but the LDAP and OAuth code paths were never updated with the same fix. This vulnerability is fixed in 0.9.0."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-269", "description": "CWE-269: Improper Privilege Management"}]}, {"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-362", "description": "CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-06-18T21:08:01.248Z"}}}, "cveMetadata": {"cveId": "CVE-2026-45675", "state": "PUBLISHED", "dateUpdated": "2026-06-18T21:08:01.248Z", "dateReserved": "2026-05-12T21:59:25.666Z", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "datePublished": "2026-05-15T19:12:57.665Z", "assignerShortName": "GitHub_M"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"product": "open-webui", "vendor": "open-webui", "versions": [{"status": "affected", "version": "< 0.9.0"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:openwebui:open_webui:*:*:*:*:*:*:*:*", "matchCriteriaId": "0FB90EC3-1665-446E-AA35-4AEC207A2F3B", "versionEndExcluding": "0.9.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, the LDAP and OAuth authentication flows use a TOCTOU (Time-of-Check-Time-of-Use) pattern for first-user admin role assignment. The regular signup handler (signup_handler in auths.py, line 663) was explicitly patched to prevent this race with the comment \"Insert with default role first to avoid TOCTOU race\", but the LDAP and OAuth code paths were never updated with the same fix. This vulnerability is fixed in 0.9.0."}, {"lang": "es", "value": "Open WebUI es una plataforma de inteligencia artificial autoalojada dise\u00f1ada para operar completamente sin conexi\u00f3n. Antes de la versi\u00f3n 0.9.0, los flujos de autenticaci\u00f3n LDAP y OAuth utilizan un patr\u00f3n TOCTOU (Time-of-Check-Time-of-Use) para la asignaci\u00f3n del rol de administrador al primer usuario. El gestor de registro regular (signup_handler en auths.py, l\u00ednea 663) fue parcheado expl\u00edcitamente para evitar esta condici\u00f3n de carrera con el comentario \u2019Insertar con rol predeterminado primero para evitar la condici\u00f3n de carrera TOCTOU\u2019, pero las rutas de c\u00f3digo LDAP y OAuth nunca se actualizaron con la misma correcci\u00f3n. Esta vulnerabilidad est\u00e1 corregida en la versi\u00f3n 0.9.0."}], "id": "CVE-2026-45675", "lastModified": "2026-11-11T20:10:00.273", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 5.9, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-45675", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-05-19T03:55:45.762046Z", "version": "2.0.3"}}]}, "published": "2026-05-15T20:16:49.220", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/open-webui/open-webui/commit/96a0b3239b1aadb23fc359bf10849c9ba12fd6ec"}, {"source": "security-advisories@github.com", "tags": ["Issue Tracking"], "url": "https://github.com/open-webui/open-webui/pull/23626"}, {"source": "security-advisories@github.com", "tags": ["Exploit", "Mitigation", "Vendor Advisory"], "url": "https://github.com/open-webui/open-webui/security/advisories/GHSA-h3ww-q6xx-w7x3"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-269"}, {"lang": "en", "value": "CWE-362"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,0.9.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "open-webui", "source": "cna", "vendor": "open-webui"}, "product": "open-webui", "vendor": "open-webui"}], "created": "2026-05-15T20:45:07.967438+00:00", "updated": "2026-06-19T00:30:17.201039+00:00", "vendors": ["open-webui", "open-webui$PRODUCT$open-webui"]}