| Component | Open WebUI |
| Severity | medium (CVSS 5.4) |
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L |
| Published (NVD) | 2026-07-09 |
| Last modified | 2026-07-10 |
| Affected versions | open_webui >= 0.8.12, < 0.10.0 |
| Fixed in | 0.10.0 |
| Weakness | CWE-862 |
| CISA KEV | not listed |
NVD description
Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.8.12 before 0.10.0, an authenticated non-admin user with read access to an arena wrapper model can reach a restricted underlying model through task endpoints such as /api/v1/tasks/moa/completions. The normal chat route resolves arena models before the final chat dispatch and therefore re-checks the selected underlying model. The task routes call utils.chat.generate_chat_completion() directly. In that direct path, arena fallback resolution happens after the wrapper access check and then recurses with bypass_filter=True, skipping the selected submodel's access check. This issue is fixed in version 0.10.0.
What to do
- Upgrade Open WebUI to
0.10.0or later. - Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
- NVD: CVE-2026-59225
- https://github.com/open-webui/open-webui/security/advisories/GHSA-m3qf-58wf-w979
- https://github.com/open-webui/open-webui/commit/dc4924b66e655b315e3be4430a3e51b7d5c20acc
- https://github.com/open-webui/open-webui/pull/26046
- https://github.com/open-webui/open-webui/releases/tag/v0.10.0
Read more
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