Missing Authorization in Open WebUI - #VU130952
Published: May 11, 2026
Vulnerability identifier: #VU130952
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: N/A
CWE-ID: CWE-862
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Open WebUI
Affected software:
Open WebUI
Open WebUI
Detailed vulnerability description
The vulnerability allows a remote user to cause a denial of service.
The vulnerability exists due to missing authorization in the /api/tasks and /api/tasks/stop/{task_id} endpoints when handling authenticated requests to list and stop tasks. A remote user can enumerate global task IDs and stop tasks belonging to other users to cause a denial of service.
This affects multi-user deployments and also exposes task IDs belonging to other users.
Remediation
Install security update from vendor's website.