Vulnerability Details CVE-2026-88005
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 12.4%
CVSS Severity
CVSS v3 Score 6.5
References
Products affected by CVE-2026-88005
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cpe:2.3:a:openwebui:open_webui:0.8.0
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cpe:2.3:a:openwebui:open_webui:0.8.1
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cpe:2.3:a:openwebui:open_webui:0.8.10
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cpe:2.3:a:openwebui:open_webui:0.8.11
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cpe:2.3:a:openwebui:open_webui:0.8.12
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cpe:2.3:a:openwebui:open_webui:0.8.2
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cpe:2.3:a:openwebui:open_webui:0.8.3
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cpe:2.3:a:openwebui:open_webui:0.8.4
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cpe:2.3:a:openwebui:open_webui:0.8.5
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cpe:2.3:a:openwebui:open_webui:0.8.6
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cpe:2.3:a:openwebui:open_webui:0.8.7
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cpe:2.3:a:openwebui:open_webui:0.8.8
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cpe:2.3:a:openwebui:open_webui:0.8.9