What is CVE-2026-45665?

CVE-2026-45665 is a high-severity vulnerability in Open-webui, classified under Cross-site Scripting. CVSS score: 8.1/10. Published 2026-05-15.

How severe is CVE-2026-45665?

High severity. CVSS v3 base score is 8.1 out of 10.

XSS in Open-webui

CVE-2026-45665

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.8.0, a Stored Cross-Site Scripting (XSS) vulnerability exists in the Banner component due to an improper sanitization order (spec…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.000 (1.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:N.

Affected products

Open-webui — versions < 0.8.0
Openwebui Open_webui

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

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

Frequently asked questions

What is CVE-2026-45665?: CVE-2026-45665 is a high-severity vulnerability in Open-webui, classified under Cross-site Scripting. CVSS score: 8.1/10. Published 2026-05-15.
How severe is CVE-2026-45665?: High severity. CVSS v3 base score is 8.1 out of 10.