CVE-2026-45365

Summary

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.

Affected Software

Weaknesses

• CWE-285: CWE-285: Improper Authorization

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: no
  • Technical Impact: partial

Additional References

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

References

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

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