VULNERABILITY INTELLIGENCE

CVE-2026-70480

CVSS score4.1 MEDIUM
EPSS probability0.35%
CISA KEVNot currently listed
Published2026-08-04
Last modified2026-09-18
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:N/A:N

Description

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.

Weakness classification

  • security-advisories@github.com: CWE-918

Primary references