Auth bypass in Open-Webui
CVE-2026-59212
Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.6 before 0.10.0, _verify_knowledge_file_access only checked read access while file write and delete routes later trusted object-derived access through writable model meta.knowledge entries, allowing a user with read-only knowledge file access to upgrade to file write or delete operations. This issue is fixed in version 0.10.0.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L.
EPSS exploit prediction
EPSS: 0.004 (34.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 34th percentile — 34.3% 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 >= 0.9.6, < 0.10.0
- Openwebui Open Webui — versions 0.9.6
Weakness classification (CWE)
References
- github.com/open-webui/open-webui/commit/17df0264929514599dbcb21c6578bcdfa204b04d (Patch)
- github.com/open-webui/open-webui/pull/26032 (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-2xwm-4h2q-ggfx (Exploit, Mitigation, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-59212?
- CVE-2026-59212 is a medium-severity vulnerability in Open-Webui, classified under Incorrect Authorization. CVSS score: 5.4/10. Published 2026-07-09.
- How severe is CVE-2026-59212?
- Medium severity. CVSS v3 base score is 5.4 out of 10.