CVE-2026-109296

MEDIUMCVSS 4.3

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.

Timeline

Published:October 12th, 2026 5:17 PM

Last modified:October 15th, 2026 4:25 PM

CVSS Scoring

CVSS v3: 4.3 (MEDIUM)

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

Weaknesses (CWE)

CWE-639

References & Reports

Advisories, patches, and third-party reports

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

Source: NIST NVD · Data may lag official sources by up to one minute