What is CVE-2026-45399?

CVE-2026-45399 is a high-severity vulnerability in Open-webui, classified under Missing Authorization. CVSS score: 7.1/10. Published 2026-05-15.

How severe is CVE-2026-45399?

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

Auth bypass in Open-webui

CVE-2026-45399

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.0, any authenticated user with low privileges can enumerate active background tasks across the system and stop tasks belonging…

Vulnerability class: Broken Access Control

EPSS: 0.000 (13.6th 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-862 — Missing Authorization

References

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

Frequently asked questions

What is CVE-2026-45399?: CVE-2026-45399 is a high-severity vulnerability in Open-webui, classified under Missing Authorization. CVSS score: 7.1/10. Published 2026-05-15.
How severe is CVE-2026-45399?: High severity. CVSS v3 base score is 7.1 out of 10.