Auth bypass in Open-Webui
CVE-2026-45345
Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.5.7, a user can modify another user's model even if its visibility is set to Private. By changing the access permissions during editing, unauthorized access can be gained. This vulnerability is fixed in 0.5.7.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.003 (24.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 24th percentile — 24.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001
Affected products
- Open-Webui — versions < 0.5.7
- Openwebui Open Webui
Weakness classification (CWE)
References
- github.com/open-webui/open-webui/security/advisories/GHSA-gm54-m39w-grjp (Exploit, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-45345?
- CVE-2026-45345 is a medium-severity vulnerability in Open-Webui, classified under Improper Authorization. CVSS score: 6.5/10. Published 2026-05-15.
- How severe is CVE-2026-45345?
- Medium severity. CVSS v3 base score is 6.5 out of 10.