What is CVE-2026-45299?

CVE-2026-45299 is a medium-severity vulnerability in Open-Webui, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-05-15.

How severe is CVE-2026-45299?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Open-Webui

CVE-2026-45299

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.8.0, the profile_image_url field on the user profile update form accepted arbitrary data: URI values without MIME-type validation, resulting in a XSS vulnerability. This vulnerability is fixed in 0.8.0.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2026-05-15 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.002 (12.5th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 13th percentile — 12.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000

Affected products

Open-Webui — versions < 0.8.0
Openwebui Open Webui

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

github.com/open-webui/open-webui/security/advisories/GHSA-6gh2-q7cp-9qf6 (Mitigation, Vendor Advisory)

Frequently asked questions

What is CVE-2026-45299?: CVE-2026-45299 is a medium-severity vulnerability in Open-Webui, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-05-15.
How severe is CVE-2026-45299?: Medium severity. CVSS v3 base score is 5.4 out of 10.