What is CVE-2026-54009?

CVE-2026-54009 is a medium-severity vulnerability in Open-webui, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.5/10. Published 2026-06-23.

How severe is CVE-2026-54009?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in Open-webui

CVE-2026-54009

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.6, POST /api/chat/completions accepts an image_url.url value that, when it does NOT start with http://, https://, or data:image…

Vulnerability class: IDOR (Insecure Direct Object Reference)

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

Affected products

Open-webui — versions < 0.9.6

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-54009?: CVE-2026-54009 is a medium-severity vulnerability in Open-webui, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.5/10. Published 2026-06-23.
How severe is CVE-2026-54009?: Medium severity. CVSS v3 base score is 6.5 out of 10.