# CVE-2026-87995

## Summary

- **CVE ID:** CVE-2026-87995
- **Severity:** HIGH
- **CVSS Score:** 8.7 (CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N)
- **CWE:** CWE-79, CWE-1021
- **Published:** Sep 9, 2026
- **Last Modified:** Sep 10, 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.

## Affected Products

- open-webui — open-webui (>= 0.8.11, < 0.11.1)

## References

- [CNA](https://github.com/open-webui/open-webui/security/advisories/GHSA-jmc6-2wr8-h3wj)
- [CNA](https://github.com/open-webui/open-webui/commit/54d7a223707f03172efbb9e754db6e69709956d0)
- [CNA](https://github.com/open-webui/open-webui/releases/tag/v0.11.1)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.22%
- **EPSS Percentile:** 12.7

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._