Auth bypass in Open-Webui
CVE-2026-59217
Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. Prior to 0.10.0, the file upload path accepted metadata.knowledge_id and auto-linked uploaded files to a target knowledge base without applying the write-access check used by /api/v1/knowledge//file/add, allowing read-only knowledge-base users to add arbitrary files. This issue is fixed in version 0.10.0.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.004 (29.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 29th percentile — 29.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Open-Webui — versions < 0.10.0
- Openwebui Open Webui
Weakness classification (CWE)
References
- github.com/open-webui/open-webui/commit/b7626f05fb92b24ab923ad81a037071ebd5623d1 (Patch)
- github.com/open-webui/open-webui/pull/26001 (Patch, Issue Tracking)
- github.com/open-webui/open-webui/releases/tag/v0.10.0 (Product, Release Notes)
- github.com/open-webui/open-webui/security/advisories/GHSA-7r7x-gjvr-448g (Exploit, Mitigation, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-59217?
- CVE-2026-59217 is a medium-severity vulnerability in Open-Webui, classified under Missing Authorization. CVSS score: 4.3/10. Published 2026-07-09.
- How severe is CVE-2026-59217?
- Medium severity. CVSS v3 base score is 4.3 out of 10.