CVE-2026-59225

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.

• CWE-862

• https://github.com/open-webui/open-webui/commit/dc4924b66e655b315e3be4430a3e51b7d5c20accPatch
• https://github.com/open-webui/open-webui/pull/26046Issue Tracking, Patch
• https://github.com/open-webui/open-webui/releases/tag/v0.10.0Product, Release Notes
• https://github.com/open-webui/open-webui/security/advisories/GHSA-m3qf-58wf-w979Mitigation, Vendor Advisory

Published

Jul 9, 2026

Last Modified

Jul 10, 2026

Status

Analyzed

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