Cloudanix VulnDB

CVE-2026-44559

Medium · 4.3

CVSS

4.3

EPSS

0.3%

Published

May 15, 2026

CISA due date

—

The record

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, the GET /api/v1/channels/{id}/members endpoint only checks membership for group and dm channel types (lines 467-469). For standard channels — including private ones — there is no channel_has_access check before returning the member list. Any authenticated user who knows a private channel's UUID can enumerate all users with access to that channel. This vulnerability is fixed in 0.9.0.

Affected packages

Ecosystem Package Introduced Fixed

Related vulnerabilities