Improper Authorization in Open WebUI - CVE-2026-34222
Published: April 24, 2026
Vulnerability identifier: #VU127478
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-34222
CWE-ID: CWE-285
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 authorization in the Tool Valves endpoint when handling requests to read tool valve data. A remote user can send a crafted request for a tool valve to disclose sensitive information.
Exploitation requires a verified account with at least Member privileges, and tool identifiers are trivial to guess because imported tool IDs are derived from tool names.
How to mitigate CVE-2026-34222
Install security update from vendor's website.