What is CVE-2026-54013?

CVE-2026-54013 is a high-severity vulnerability in Open-Webui, classified under Cross-site Scripting. CVSS score: 7.6/10. Published 2026-06-23.

How severe is CVE-2026-54013?

High severity. CVSS v3 base score is 7.6 out of 10.

XSS in Open-Webui

CVE-2026-54013

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.6, Open WebUI patched SVG XSS in user profile images and webhook profile images but forgot to apply the same fix to model profile images. The ModelMeta class has no validate_profile_image_url field validator, and the model image serving endpoint has no MIME allowlist or nosniff header. Any authenticated user with workspace.models permission (enabled by default) can store a data:image/svg+xml;base64,... payload in a model's profile image and achieve full account takeover of anyone who navigates to the image URL. This vulnerability is fixed in 0.9.6.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.003 (22.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N.

Affected products

Open-webui — versions < 0.9.6
Openwebui Open_webui

Weakness classification (CWE)

References

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

Frequently asked questions

What is CVE-2026-54013?: CVE-2026-54013 is a high-severity vulnerability in Open-Webui, classified under Cross-site Scripting. CVSS score: 7.6/10. Published 2026-06-23.
How severe is CVE-2026-54013?: High severity. CVSS v3 base score is 7.6 out of 10.