Vulnerability in Open-Webui
CVE-2026-109289
Open WebUI from 0.8.8 before 0.11.4 contains an improper authorization vulnerability that allows deactivated users to keep executing terminal commands through an already open terminal WebSocket. Because the terminal proxy route in terminals.py checks access only on the first message, deactivated users can keep running commands and reading or writing files on the terminal server.
Published .
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/open-webui/open-webui/security/advisories/GHSA-6g45-8g27-fh8q (vendor-advisory)
- www.vulncheck.com/advisories/open-webui-0.8.8-before-0.11.4-improper-session-re… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-109289?
- CVE-2026-109289 is a medium-severity vulnerability in Open-Webui, classified under Insufficient Session Expiration. CVSS score: 6.3/10. Published 2026-10-12.
- How severe is CVE-2026-109289?
- Medium severity. CVSS v3 base score is 6.3 out of 10.