CVE-2026-88005
Medium
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.
SeverityMedium
CVSS6.5
Exploit probability—
ProductOpenwebui Open Webui
PublishedSep 10, 2026
First seenSep 10, 2026
Weakness typeCWE-863Incorrect authorization
How to fix
Update
- openwebui open_webui0.9.0 or later
- open-webui0.9.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| openwebui open_webui | 0.8.0 ≤ v < 0.9.0 | 0.9.0 |
| open-webuiPyPI | 0.8.0 ≤ v < 0.9.0 | 0.9.0 |
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