---
cve: "CVE-2026-59221"
severity: "HIGH"
cvss: 7.7
epss: "36%"
vendor: "open-webui"
kev: false
exploited: false
published: "2026-07-09 18:16:55"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-11T12:20:59+02:00"
---

# CVE-2026-59221

> 7.7 HIGH · 🧪 PoC

## Beschreibung

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. From 0.9.6 before 0.10.0, _sanitize_proxy_path in backend/open_webui/routers/terminals.py decoded proxy paths only eight times, allowing a nine-times percent-encoded ../ traversal value to pass normalization checks and be decoded by the upstream terminal server. This issue is fixed in version 0.10.0.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- 4d2e13cf2bcc451b33bb6374bea4d2163e6cc94c (Commit)

## Referenzen

- <https://github.com/open-webui/open-webui/security/advisories/GHSA-frvj-c5qp-xj4w>
- <https://github.com/open-webui/open-webui/pull/26050>
- <https://github.com/open-webui/open-webui/commit/05098d25a58d03738e01c4e85e8852c3b4ad849c>
- <https://github.com/open-webui/open-webui/releases/tag/v0.10.0>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-59221) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_