Improper access control in Open WebUI - CVE-2026-54022
Published: June 30, 2026
Vulnerability identifier: #VU135950
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-54022
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 disclose sensitive information.
The vulnerability exists due to improper access control in the ydoc:document:join Socket.IO handler and YdocManager document ID normalization when joining a document room with a crafted document identifier. A remote user can use a note_ document ID instead of note: for a target note to disclose sensitive information.
Exploitation requires authentication and knowledge of or the ability to enumerate the target note ID.
How to mitigate CVE-2026-54022
Install security update from vendor's website.