What is CVE-2026-44551?

CVE-2026-44551 is a critical-severity vulnerability in Open-webui, classified under Improper Authentication. CVSS score: 9.1/10. Published 2026-05-15.

How severe is CVE-2026-44551?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Auth bypass in Open-webui

CVE-2026-44551

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, the LDAP authentication endpoint does not validate that the submitted password is non-empty before performing a Simple Bind…

Vulnerability class: Broken Authentication

EPSS: 0.000 (13.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

Affected products

Open-webui — versions < 0.9.0
Openwebui Open_webui

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

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

Frequently asked questions

What is CVE-2026-44551?: CVE-2026-44551 is a critical-severity vulnerability in Open-webui, classified under Improper Authentication. CVSS score: 9.1/10. Published 2026-05-15.
How severe is CVE-2026-44551?: Critical severity. CVSS v3 base score is 9.1 out of 10.