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.
Advisories

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Fixes

Solution

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Workaround

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History

Sun, 18 Oct 2026 12:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 12 Oct 2026 16:30:00 +0000

Type Values Removed Values Added
Description 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.
Title Open WebUI before 0.11.4 Missing Authorization via Backend Index on Model Routes
First Time appeared Openwebui
Openwebui open Webui
Weaknesses CWE-639
CPEs cpe:2.3:a:openwebui:open_webui:*:*:*:*:*:*:*:*
Vendors & Products Openwebui
Openwebui open Webui
References
Metrics cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N'}

cvssV4_0

{'score': 5.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-18T12:03:15.265Z

Reserved: 2026-10-12T14:12:52.833Z

Link: CVE-2026-109296

cve-icon Vulnrichment

Updated: 2026-10-18T11:53:07.008Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-12T17:17:23.097

Modified: 2026-10-18T12:17:04.270

Link: CVE-2026-109296

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-13T05:30:17Z

Weaknesses