Description
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.
Published: 2026-03-05
Score: 9.8 Critical
EPSS: 4.2% Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

No analysis available yet.

Remediation

No remediation available yet.

Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-g9w5-qffc-6762 Nginx-UI Vulnerable to Unauthenticated Backup Download with Encryption Key Disclosure
History

Thu, 19 Mar 2026 15:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Tue, 10 Mar 2026 18:15:00 +0000

Type Values Removed Values Added
First Time appeared Nginxui
Nginxui nginx Ui
CPEs cpe:2.3:a:nginxui:nginx_ui:*:*:*:*:*:*:*:*
Vendors & Products Nginxui
Nginxui nginx Ui

Fri, 06 Mar 2026 17:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Fri, 06 Mar 2026 15:30:00 +0000

Type Values Removed Values Added
First Time appeared 0xjacky
0xjacky nginx-ui
Vendors & Products 0xjacky
0xjacky nginx-ui

Thu, 05 Mar 2026 18:15:00 +0000

Type Values Removed Values Added
Description 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.
Title Nginx UI: Unauthenticated Backup Download with Encryption Key Disclosure
Weaknesses CWE-306
CWE-311
References
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}


Subscriptions

0xjacky Nginx-ui
Nginxui Nginx Ui
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-03-19T14:49:05.173Z

Reserved: 2026-02-25T03:11:36.690Z

Link: CVE-2026-27944

cve-icon Vulnrichment

Updated: 2026-03-06T16:01:37.626Z

cve-icon NVD

Status : Analyzed

Published: 2026-03-05T19:16:05.840

Modified: 2026-03-10T18:11:27.450

Link: CVE-2026-27944

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-03-06T15:01:34Z

Weaknesses