Incorrect authorization in Open WebUI - #VU130932
Published: May 11, 2026
Vulnerability identifier: #VU130932
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: N/A
CWE-ID: CWE-863
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 modify note pin status without proper write authorization.
The vulnerability exists due to incorrect authorization in the POST /api/v1/notes/{id}/pin endpoint when handling pin toggle requests for shared notes. A remote user can send a crafted pin request to modify note pin status without proper write authorization.
User interaction is required, and exploitation requires read access to a shared note via explicit sharing. Only the is_pinned field can be modified.
Remediation
Install security update from vendor's website.