Improper Restriction of Rendered UI Layers or Frames

Overview open-webui is an Open WebUI Affected versions of this package are vulnerable to Improper Restriction of Rendered UI Layers or Frames in the PortPreview process. An attacker can gain access to session tokens and take over user accounts by serving malicious scripts on a terminal server por...

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...

CVE-2026-87995 Open WebUI: Same-origin XSS to account takeover via terminal port-preview iframe hardcoding allow-same-origin

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...