Missing Authorization in Open WebUI - CVE-2026-44559
Published: May 5, 2026
Vulnerability identifier: #VU130175
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-44559
CWE-ID: CWE-862
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to disclose sensitive information.
The vulnerability exists due to improper access control in the GET /api/v1/channels/{id}/members endpoint when handling requests for standard channels. A remote user can send a request for a private channel's member list to disclose sensitive information.
Channels must be enabled, and exploitation requires knowledge of the target channel UUID.
Affected software
Open WebUI
How to mitigate CVE-2026-44559
Install security update from vendor's website.
Open WebUI - update to 0.9.0