What is CVE-2026-44556?

CVE-2026-44556 is a high-severity vulnerability in Open-webui, classified under Improper Access Control. CVSS score: 7.1/10. Published 2026-05-15.

How severe is CVE-2026-44556?

High severity. CVSS v3 base score is 7.1 out of 10.

Auth bypass in Open-webui

CVE-2026-44556

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, the /responses endpoint in the OpenAI router accepts any authenticated user and forwards requests directly to upstream LLM p…

EPSS: 0.000 (2.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H.

Affected products

Open-webui — versions < 0.9.0
Openwebui Open_webui

Weakness classification (CWE)

CWE-284 — Improper Access Control
CWE-862 — Missing Authorization

References

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

Frequently asked questions

What is CVE-2026-44556?: CVE-2026-44556 is a high-severity vulnerability in Open-webui, classified under Improper Access Control. CVSS score: 7.1/10. Published 2026-05-15.
How severe is CVE-2026-44556?: High severity. CVSS v3 base score is 7.1 out of 10.