---
id: CVE-2026-109296
title: >-
  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
summary: >-
  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 q…
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N'
cwe:
  - CWE-639
published: '2026-10-12'
updated: '2026-10-12'
sourceUpdated: '2026-10-12T17:17:23.097'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-109296'
references:
  - url: >-
      https://github.com/open-webui/open-webui/security/advisories/GHSA-hm62-64q2-6gxw
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/open-webui-before-0.11.4-missing-authorization-via-backend-index-on-model-routes
    label: disclosure@vulncheck.com
tags:
  - nvd
ingestedAt: '2026-10-12T18:00:08.192Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.