---
cve: "CVE-2026-27944"
severity: "CRITICAL"
cvss: 9.8
epss: "22.2%"
vendor: "0xJacky"
kev: false
exploited: false
published: "2026-03-05 19:16:05"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-13T07:07:07+02:00"
---

# CVE-2026-27944

> 9.8 CRITICAL · 🧪 PoC

## Beschreibung

Nginx UI is a web user interface for the Nginx web server. Prior to version 2.3.3, the /api/backup endpoint is accessible without authentication and discloses the encryption keys required to decrypt the backup in the X-Backup-Security response header. This allows an unauthenticated attacker to download a full system backup containing sensitive data (user credentials, session tokens, SSL private keys, Nginx configurations) and decrypt it immediately. This issue has been patched in version 2.3.3.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- e5da6dd96dae5567a7aaa27a4000a4762696d89c (Commit)

## Referenzen

- <https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-g9w5-qffc-6762>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-27944) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_