---
cve: "CVE-2026-87995"
severity: "HIGH"
cvss: 8.7
epss: "0.2%"
vendor: "open-webui"
kev: false
exploited: false
published: "2026-09-09 22:18:47"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-21T18:26:46+02:00"
---

# CVE-2026-87995

> 8.7 HIGH · 🧪 PoC

## Beschreibung

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.

## CVSS-Vektor

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

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |
| UI Interaktion | Erforderlich | good |
| S Scope | Verändert | bad |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Keine | good |

## Patch verfügbar (OSV)

- d3e8bf3405e848cfba377814d0aa7ba7290e414d (Commit)
- 54d7a223707f03172efbb9e754db6e69709956d0 (Commit)

## Referenzen

- <https://github.com/open-webui/open-webui/security/advisories/GHSA-jmc6-2wr8-h3wj>
- <https://github.com/open-webui/open-webui/commit/54d7a223707f03172efbb9e754db6e69709956d0>
- <https://github.com/open-webui/open-webui/releases/tag/v0.11.1>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-87995) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_