CVE-2026-70480

MEDIUM

Open WebUI: Client-side SSRF via unrestricted external resource loading in Vega/Vega-Lite chart rendering

Title source: cna
STIX 2.1

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.

References (4)

Core 4

Scores

CVSS v3 4.1
EPSS 0.0019
EPSS Percentile 9.1%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-918
Status published
Products (2)
open-webui/open-webui >= 0.6.34, < 0.11.0
pypi/open-webui 0.6.34 - 0.11.0PyPI
Published Aug 04, 2026
Tracked Since Aug 05, 2026