CVE-2026-109296Open WebUI before 0.11.4 Missing Authorization via Backend Index on Model Routes
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 4.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
- Weakness (CWE)
- CWE-639
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Awaiting Analysis
- Record last updated
- Oct 18, 2026
- First seen by InfoSec Signals
- Oct 12, 2026
Affected products
open-webui open-webui open_webui:open_webui (from the name) | before 0.11.4; 0.11.4 not affected | CNA record |
References
- https://github.com/open-webui/open-webui/security/advisories/GHSA-hm62-64q2-6gxwvendor-advisory
- https://www.vulncheck.com/advisories/open-webui-before-0.11.4-missing-authorization-via-backend-index-on-model-routesthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.