CVE-2026-27944

9.8 CRITICAL
Published: March 05, 2026 Modified: March 10, 2026
View on NVD

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.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-g9w5-qffc-6762
Source: security-advisories@github.com
Exploit Vendor Advisory

1 reference(s) from NVD

Quick Stats

CVSS v3 Score
9.8 / 10.0
EPSS (Exploit Probability)
1.0%
77th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

Affected Vendors

nginxui