What is CVE-2026-45400?

CVE-2026-45400 is a high-severity vulnerability in Open-webui, classified under Server-Side Request Forgery (SSRF). CVSS score: 8.5/10. Published 2026-05-15.

How severe is CVE-2026-45400?

High severity. CVSS v3 base score is 8.5 out of 10.

SSRF in Open-webui

CVE-2026-45400

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.5, a parsing difference between the urlparse and requests libraries led to an SSRF bypass vulnerability. This vulnerability is…

Vulnerability class: SSRF (Server-Side Request Forgery)

EPSS: 0.000 (10.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N.

Affected products

Open-webui — versions < 0.9.5
Openwebui Open_webui

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

References

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

Frequently asked questions

What is CVE-2026-45400?: CVE-2026-45400 is a high-severity vulnerability in Open-webui, classified under Server-Side Request Forgery (SSRF). CVSS score: 8.5/10. Published 2026-05-15.
How severe is CVE-2026-45400?: High severity. CVSS v3 base score is 8.5 out of 10.