CVE-2026-87995

HighCVSS 8.7/10Last modified Sep 16, 2026

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. This issue is fixed in version 0.11.1.

Metrics

CVSS 3.1 8.7/10CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

Weakness enumeration

CWE-79CWE-1021

Affected software

VendorProductVersions
open-webuiopen-webui>= 0.8.11, < 0.11.1

References

Timeline

Published
Sep 9, 2026
Last modified
Sep 16, 2026
NVD status
Analyzed

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