Improper access control in Open WebUI - #VU130173
Published: May 5, 2026
Vulnerability identifier: #VU130173
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: N/A
CWE-ID: CWE-284
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 overwrite any existing model and modify its access grants.
The vulnerability exists due to improper access control in the POST /api/v1/models/import endpoint when handling model import requests with an ID matching an existing model. A remote user can send a specially crafted import request to overwrite any existing model and modify its access grants.
Exploitation requires the workspace.models_import permission and knowledge of the target model ID.
Remediation
Install security update from vendor's website.