Cloudanix VulnDB

CVE-2026-44561

Medium · 5.4

CVSS

5.4

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 is_user_channel_member function checks whether a ChannelMember row exists but does not check the is_active field. When a user is deactivated from a group or DM channel (removed by the channel owner, or leaves voluntarily), their membership row persists with is_active=False and status='left'. Because the authorization check ignores this field, the deactivated user retains full read and write access to the channel via direct API calls. This vulnerability is fixed in 0.9.0.

Affected packages

Ecosystem Package Introduced Fixed

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