CVE-2026-109296

CVSS 5.3 (medium) · published 2026-10-12

Open WebUI before 0.11.4 contains a missing authorization vulnerability that allows authenticated users to reach disabled model provider backends by supplying an explicit backend index. Attackers can pass the index as a path segment or query parameter on Ollama and OpenAI-compatible listing routes to trigger requests carrying configured API keys, read version strings, and enumerate connections.

Weakness: CWE-639, CWE-862

Source: NVD CVE-2026-109296

References

• https://github.com/open-webui/open-webui/security/advisories/GHSA-hm62-64q2-6gxw
• https://www.vulncheck.com/advisories/open-webui-before-0.11.4-missing-authorization-via-backend-index-on-model-routes

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