Open WebUI: Channel Access Grants Bypass filter_allowed_access_grants_CVE-2026-44558

5.4 / 10

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Description

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.

Basic Information

ID CVE-2026-44558

Source GitHub_M

Published May 15, 2026 at 19:43

Affected Product

Vendor open-webui

Product open-webui

Version < 0.9.0

Affected Versions open-webui open-webui < 0.9.0

CWE Classification

CWE-862

References

github.com /open-webui/open-webui/security/advisories/GHSA-7rjh-px4v-5w55

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    "published": "2026-05-15T19:43:40.120Z",
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