Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, the GET /api/v1/channels/{id}/members endpoint only checks membership for group and dm channel types (lines 467-469). For standard channels — including private ones — there is no channel_has_access check before returning the member list. Any authenticated user who knows a private channel's UUID can enumerate all users with access to that channel. This vulnerability is fixed in 0.9.0.
Metrics
Affected Vendors & Products
References
History
Fri, 15 May 2026 21:45:00 +0000
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Open-webui
Open-webui open-webui |
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Open-webui
Open-webui open-webui |
Fri, 15 May 2026 21:15:00 +0000
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ssvc
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Fri, 15 May 2026 20:15:00 +0000
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| Description | Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, the GET /api/v1/channels/{id}/members endpoint only checks membership for group and dm channel types (lines 467-469). For standard channels — including private ones — there is no channel_has_access check before returning the member list. Any authenticated user who knows a private channel's UUID can enumerate all users with access to that channel. This vulnerability is fixed in 0.9.0. | |
| Title | Open WebUI: Missing Access Check on Channel Members Endpoint for Standard Channels | |
| Weaknesses | CWE-862 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-05-15T19:41:59.913Z
Updated: 2026-05-15T20:28:38.679Z
Reserved: 2026-05-06T20:59:00.595Z
Link: CVE-2026-44559
Updated: 2026-05-15T20:27:20.359Z
Status : Received
Published: 2026-05-15T20:16:47.483
Modified: 2026-05-15T21:16:36.017
Link: CVE-2026-44559
No data.