CVE-2026-44558

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.

PUBLISHED Reserved 2026-05-06 | Published 2026-05-15 | Updated 2026-05-19 | Assigner GitHub_M

Problem types

CWE-862: Missing Authorization

Product status

References

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

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

cve.org (CVE-2026-44558)

nvd.nist.gov (CVE-2026-44558)

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