Vulnerability Details CVE-2026-87995
Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.8.11 until 0.11.1, src/lib/components/chat/FileNav/PortPreview.svelte rendered terminal port content in an iframe sandbox containing both allow-scripts and allow-same-origin. Because the terminal proxy serves that content from the Open WebUI origin, an authenticated user with access to a shared terminal server could host script on a previewed port and take over a victim's account when the victim opened the preview. This issue is fixed in version 0.11.1.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 12.9%
CVSS Severity
CVSS v3 Score 8.7
References
- https://github.com/open-webui/open-webui/commit/54d7a223707f03172efbb9e754db6e69709956d0
- https://github.com/open-webui/open-webui/releases/tag/v0.11.1
- https://github.com/open-webui/open-webui/security/advisories/GHSA-jmc6-2wr8-h3wj
- https://github.com/open-webui/open-webui/security/advisories/GHSA-jmc6-2wr8-h3wj
Products affected by CVE-2026-87995
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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:0.11.0
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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:0.9.0
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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