{"schemaVersion":3,"id":"CVE-2026-87995","aliases":["GHSA-jmc6-2wr8-h3wj","PYSEC-2026-4123"],"status":"published","duplicateOf":null,"title":null,"description":"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. 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