Incorrect authorization in Open WebUI - CVE-2026-45316
Published: May 11, 2026
Vulnerability identifier: #VU130932
CSH Severity: Low
CVSS v4: 4.8 [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]
CVE-ID: CVE-2026-45316
CWE-ID: CWE-863
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
Open WebUI
How to mitigate CVE-2026-45316
Install security update from vendor's website.
Open WebUI - update to 0.9.3