CVE-2026-109289 Open WebUI 0.8.8 before 0.11.4 Improper Session Revocation via Terminal WebSocket
Deactivated users can execute terminal commands and access files via persistent WebSocket connections due to insufficient authorization checks.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-109289?
CVE-2026-109289 is a medium-severity missing authorization vulnerability in open-webui, published on 12 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-613
Which versions are affected by CVE-2026-109289?
How do I fix CVE-2026-109289?
No fix has been published for CVE-2026-109289 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-109289 being exploited?
There is no known exploitation of CVE-2026-109289 in the wild and no public exploit code.
Sources
Also known as GHSA-6g45-8g27-fh8q, GHSA-wqjg-w22m-7835.