Auth bypass in Open-Webui
CVE-2026-59224
Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. Prior to 0.10.0, backend/open_webui/routers/terminals.py built the ws_terminal upstream URL from an unencoded session_id and appended user_id as a query parameter, allowing query injection to make the terminal backend resolve another user identity; the HTTP proxy path also forwarded X-User-Id as an integrity-unbound identity claim. This issue is fixed in version 0.10.0.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.0 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (31.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 31st percentile — 31.1% 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/5f3a628a8d291bb5d33e1a0b0c89fb62a2927934 (Patch)
- github.com/open-webui/open-webui/pull/26042 (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-j657-m4c4-24jq (Mitigation, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-59224?
- CVE-2026-59224 is a high-severity vulnerability in Open-Webui, classified under Improper Authentication. CVSS score: 8.0/10. Published 2026-07-09.
- How severe is CVE-2026-59224?
- High severity. CVSS v3 base score is 8.0 out of 10.