CVE-2026-44558
Medium · 5.4CVSS
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 channel router does not call filter_allowed_access_grants on either create or update paths. A non-admin user who can create group channels (or who owns a channel) can submit arbitrary access grants — including public wildcard grants — and those grants are stored verbatim, bypassing the admin's permission framework. This vulnerability is fixed in 0.9.0.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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