SSRF in Open-Webui
CVE-2026-70480
Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.6.34 until 0.11.0, Open WebUI renders vega and vega-lite fenced code blocks in chat content by building a Vega view in the viewer browser without a restricted resource loader. Any user who can place such a block where another user will see it can make that user browser issue attacker-chosen outbound GET requests and read responses from same-origin or CORS-permissive targets into the rendered page. This issue is fixed in 0.11.0.
Vulnerability class: SSRF (Server-Side Request Forgery)
EPSS: 0.002 (9.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:N/A:N.
Affected products
- Open-webui — versions >= 0.6.34, < 0.11.0
- Openwebui Open_webui
Weakness classification (CWE)
References
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (Patch, x_refsource_MISC, Vendor Advisory)
- security-advisories@github.com (x_refsource_MISC, Release Notes)
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-70480?
- CVE-2026-70480 is a medium-severity vulnerability in Open-Webui, classified under Server-Side Request Forgery (SSRF). CVSS score: 4.1/10. Published 2026-08-04.
- How severe is CVE-2026-70480?
- Medium severity. CVSS v3 base score is 4.1 out of 10.