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.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/open-webui/open-webui/commit/fb5ef978bfb451c3f2221931e08e54250cec58ca	Patch
https://github.com/open-webui/open-webui/pull/23639	Patch
https://github.com/open-webui/open-webui/security/advisories/GHSA-4qg5-cxx4-g927	Patch Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:openwebui:open_webui:*:*:*:*:*:*:*:*

History

18 Sep 2026, 14:44

Type	Values Removed	Values Added
First Time		Openwebui Openwebui open Webui
CPE		cpe:2.3:a:openwebui:open_webui::::::::
References	~~() https://github.com/open-webui/open-webui/commit/fb5ef978bfb451c3f2221931e08e54250cec58ca -~~	() https://github.com/open-webui/open-webui/commit/fb5ef978bfb451c3f2221931e08e54250cec58ca - Patch
References	~~() https://github.com/open-webui/open-webui/pull/23639 -~~	() https://github.com/open-webui/open-webui/pull/23639 - Patch
References	~~() https://github.com/open-webui/open-webui/security/advisories/GHSA-4qg5-cxx4-g927 -~~	() https://github.com/open-webui/open-webui/security/advisories/GHSA-4qg5-cxx4-g927 - Patch, Vendor Advisory

Information

Published : 2026-09-10 15:17

Updated : 2026-09-18 14:44

NVD link : CVE-2026-88005

Mitre link : CVE-2026-88005

CVE.ORG link : CVE-2026-88005

JSON object : View

Products Affected

openwebui

open_webui

CWE

CWE-863

Incorrect Authorization

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