CVE-2026-45365

Open WebUI: Authenticated users can bypass model access control via exposed query parameter

CVSS 5.4 MEDIUMEPSS 0.2%CWE-285

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 5.4EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

15 May 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.8.11, an internal-only bypass_filter parameter is exposed on the /openai/chat/completions and /ollama/api/chat HTTP endpoints via FastAPI query string binding, allowing any authenticated user to append ?bypass_filter=true and bypass model access control checks to invoke admin-restricted models. This vulnerability is fixed in 0.8.11.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Affected products

open-webui · open-webui

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References

https://github.com/open-webui/open-webui/security/advisories/GHSA-v6qf-75pr-p96m