CVE-2026-70480CWE-918ssrf

CVE-2026-70480

Medium · published August 5, 2026

CVSS v3.1
4.1
EPSS
0%
Percentile
26.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
4.1 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00346 · 26.9th percentile
Weakness
CWE-918 · Server-Side Request Forgery (SSRF)
Published
2026-08-05T00:16Z
Affected products (1)
ProductVersionsFixed in
openwebui/open_webui≥ 0.6.34, < 0.11.00.11.0
References (5)
https://github.com/open-webui/open-webui/commit/5278eb906ebecefc6538a19bc86df09d997e43e6 · [email protected]https://github.com/open-webui/open-webui/pull/26806 · [email protected]https://github.com/open-webui/open-webui/releases/tag/v0.11.0 · [email protected]https://github.com/open-webui/open-webui/security/advisories/GHSA-rffm-9q57-q649 · [email protected]https://github.com/open-webui/open-webui/security/advisories/GHSA-rffm-9q57-q649 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 04 AUG 19:43Z
    Open WebUI: Client-side SSRF via unrestricted external resource loading in Vega/Vega-Lite chart rendering
    cvelistv5