CVE-2026-88005
Open WebUI: Users denied by the OAuth domain allowlist or role policy can still sign in via token exchange
- State
- Published
- Severity
- 6.5 Medium
- Published
- Sep 10, 2026
- Updated
- Sep 15, 2026
- Reserved
- Sep 9, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 6.5 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N | GitHub_M |
Weaknesses
- CWE-863 Incorrect Authorization
Affected Products
| Product | Versions |
|---|---|
open-webuiopen-webui |
|
References
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