What is CVE-2026-44558?

CVE-2026-44558 is a medium-severity vulnerability in Open-webui, classified under Missing Authorization. CVSS score: 5.4/10. Published 2026-05-15.

How severe is CVE-2026-44558?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Auth bypass in Open-webui

CVE-2026-44558

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 cre…

Vulnerability class: Broken Access Control

EPSS: 0.000 (8.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.

Affected products

Open-webui — versions < 0.9.0
Openwebui Open_webui

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)

Frequently asked questions

What is CVE-2026-44558?: CVE-2026-44558 is a medium-severity vulnerability in Open-webui, classified under Missing Authorization. CVSS score: 5.4/10. Published 2026-05-15.
How severe is CVE-2026-44558?: Medium severity. CVSS v3 base score is 5.4 out of 10.