Auth bypass in Open-Webui
CVE-2026-59215
Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. Prior to 0.10.0, channel thread parent and reply handling did not bind parent_id to the channel in the URL, allowing an authenticated user to reference a message from another private or DM channel and disclose thread context across channels. This issue is fixed in version 0.10.0.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.1 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.003 (23.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 23rd percentile — 23.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · 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/a66477b7104c5d141ce7bffaea424b43e7666ef1 (Patch)
- github.com/open-webui/open-webui/pull/25766 (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-73x5-h92w-xc2j (Mitigation, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-59215?
- CVE-2026-59215 is a low-severity vulnerability in Open-Webui, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 3.1/10. Published 2026-07-09.
- How severe is CVE-2026-59215?
- Low severity. CVSS v3 base score is 3.1 out of 10.