CVE-2026-70480
Open WebUI: Client-side SSRF via unrestricted external resource loading in Vega/Vega-Lite chart rendering
CVSS Score
4.1
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-918 |
| Vendor | open-webui |
| Product | open-webui |
| Published | Aug 4, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:N/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
None
Availability
None
Affected Versions
open-webui / open-webui
>= 0.6.34, < 0.11.0
References
github.com: https://github.com/open-webui/open-webui/security/advisories/GHSA-rffm-9q57-q649 github.com: https://github.com/open-webui/open-webui/pull/26806 github.com: https://github.com/open-webui/open-webui/commit/5278eb906ebecefc6538a19bc86df09d997e43e6 github.com: https://github.com/open-webui/open-webui/releases/tag/v0.11.0