Vulnerability Details 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 10.0%
CVSS Severity
CVSS v3 Score 4.1
References
- https://github.com/open-webui/open-webui/commit/5278eb906ebecefc6538a19bc86df09d997e43e6
- https://github.com/open-webui/open-webui/pull/26806
- https://github.com/open-webui/open-webui/releases/tag/v0.11.0
- https://github.com/open-webui/open-webui/security/advisories/GHSA-rffm-9q57-q649
- https://github.com/open-webui/open-webui/security/advisories/GHSA-rffm-9q57-q649
Products affected by CVE-2026-70480
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cpe:2.3:a:openwebui:open_webui:0.10.0
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cpe:2.3:a:openwebui:open_webui:0.10.1
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cpe:2.3:a:openwebui:open_webui:0.10.2
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cpe:2.3:a:openwebui:open_webui:0.6.34
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cpe:2.3:a:openwebui:open_webui:0.6.35
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cpe:2.3:a:openwebui:open_webui:0.6.36
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cpe:2.3:a:openwebui:open_webui:0.6.37
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cpe:2.3:a:openwebui:open_webui:0.6.38
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cpe:2.3:a:openwebui:open_webui:0.6.39
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cpe:2.3:a:openwebui:open_webui:0.6.40
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cpe:2.3:a:openwebui:open_webui:0.6.41
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cpe:2.3:a:openwebui:open_webui:0.6.42
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cpe:2.3:a:openwebui:open_webui:0.6.43
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cpe:2.3:a:openwebui:open_webui:0.6.44
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cpe:2.3:a:openwebui:open_webui:0.7.0
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cpe:2.3:a:openwebui:open_webui:0.7.1
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cpe:2.3:a:openwebui:open_webui:0.7.2
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cpe:2.3:a:openwebui:open_webui:0.8.0
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cpe:2.3:a:openwebui:open_webui:0.8.1
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cpe:2.3:a:openwebui:open_webui:0.8.10
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cpe:2.3:a:openwebui:open_webui:0.8.11
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cpe:2.3:a:openwebui:open_webui:0.8.12
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cpe:2.3:a:openwebui:open_webui:0.8.2
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cpe:2.3:a:openwebui:open_webui:0.8.3
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cpe:2.3:a:openwebui:open_webui:0.8.4
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cpe:2.3:a:openwebui:open_webui:0.8.5
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cpe:2.3:a:openwebui:open_webui:0.8.6
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cpe:2.3:a:openwebui:open_webui:0.8.7
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cpe:2.3:a:openwebui:open_webui:0.8.8
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cpe:2.3:a:openwebui:open_webui:0.8.9
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cpe:2.3:a:openwebui:open_webui:0.9.0
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cpe:2.3:a:openwebui:open_webui:0.9.1
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cpe:2.3:a:openwebui:open_webui:0.9.2
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cpe:2.3:a:openwebui:open_webui:0.9.3
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cpe:2.3:a:openwebui:open_webui:0.9.4
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cpe:2.3:a:openwebui:open_webui:0.9.5
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cpe:2.3:a:openwebui:open_webui:0.9.6