Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Openwebui | Open Webui | < 0.9.0 |
Related Weaknesses (CWE)
References
- https://github.com/open-webui/open-webui/security/advisories/GHSA-7rjh-px4v-5w55ExploitVendor Advisory
- https://github.com/open-webui/open-webui/security/advisories/GHSA-7rjh-px4v-5w55ExploitVendor Advisory
FAQ
What is CVE-2026-44558?
CVE-2026-44558 is a vulnerability with a CVSS score of 5.4 (MEDIUM). 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 upd...
How severe is CVE-2026-44558?
CVE-2026-44558 has been rated MEDIUM with a CVSS base score of 5.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-44558?
Check the references section above for vendor advisories and patch information. Affected products include: Openwebui Open Webui.