What is CVE-2026-44555?

CVE-2026-44555 is a high-severity vulnerability in Open-webui, classified under Missing Authorization. CVSS score: 7.6/10. Published 2026-05-15.

How severe is CVE-2026-44555?

High severity. CVSS v3 base score is 7.6 out of 10.

Auth bypass in Open-webui

CVE-2026-44555

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, Open WebUI supports model composition via base_model_id: a user-defined model (e.g., "Cheap Assistant") can reference an exi…

Vulnerability class: Broken Access Control

EPSS: 0.000 (14.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L.

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-2026-44555?: CVE-2026-44555 is a high-severity vulnerability in Open-webui, classified under Missing Authorization. CVSS score: 7.6/10. Published 2026-05-15.
How severe is CVE-2026-44555?: High severity. CVSS v3 base score is 7.6 out of 10.