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CVE-2026-59225
5.4 MEDIUM
- CVSS version (CVSS): 3.1
- Attack Vector (AV): Network (N)
- Attack Complexity (AC): Low (L)
- Privileges Required (PR): Low (L)
- User Interaction (UI): None (N)
- Scope (S): Unchanged (U)
- Confidentiality (C): Low (L)
- Integrity (I): None (N)
- Availability (A): Low (L)
- Modified Attack Vector (MAV): Network (N)
- Modified Attack Complexity (MAC): Low (L)
- Modified Privileges Required (MPR): Low (L)
- Modified User Interaction (MUI): None (N)
- Modified Confidentiality (MC): Low (L)
- Modified Scope (MS): Unchanged (U)
- Modified Integrity (MI): None (N)
- Modified Availability (MA): Low (L)
Activity log
- Created suggestion
Open WebUI: Arena task endpoints can bypass underlying model access controls
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.
References
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https://github.com/open-webui/open-webui/security/advisories/GHSA-m3qf-58wf-w979 x_refsource_CONFIRM
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https://github.com/open-webui/open-webui/pull/26046 x_refsource_MISC
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https://github.com/open-webui/open-webui/releases/tag/v0.10.0 x_refsource_MISC
Affected products
open-webui
- ==>= 0.8.12, < 0.10.0
Package maintainers
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@shivaraj-bh Shivaraj B H <sbh69840@gmail.com>
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@codgician codgician <codgician@outlook.com>