What is CVE-2026-70486?

CVE-2026-70486 is a high-severity vulnerability in Open-webui, classified under Cross-site Scripting. CVSS score: 8.2/10. Published 2026-08-04.

How severe is CVE-2026-70486?

High severity. CVSS v3 base score is 8.2 out of 10.

XSS in Open-webui

CVE-2026-70486

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.0 until 0.11.0, the terminal file-preview serveUrl iframe branch always granted allow-same-origin together with allow-scripts for HTML files ser…

Vulnerability class: XSS (Cross-Site Scripting)

CVSS v3 metric

CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N.

Affected products

Open-webui — versions >= 0.9.0, < 0.11.0

Weakness classification (CWE)

References

security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-70486?: CVE-2026-70486 is a high-severity vulnerability in Open-webui, classified under Cross-site Scripting. CVSS score: 8.2/10. Published 2026-08-04.
How severe is CVE-2026-70486?: High severity. CVSS v3 base score is 8.2 out of 10.