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CVE-2026-27944

CRITICAL CVSS 3.1: 9.8 EPSS 0.05%
Updated Mar 05, 2026
Nginx
Parameter Value
CVSS 9.8 (CRITICAL)
Fixed In 2.3.3
Type CWE-311 (Missing Encryption (Отсутствие шифрования)), CWE-306 (Missing Authentication for Critical Function (Отсутствие аутентификации))
Vendor Nginx
Public PoC No

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.

Attack Parameters

Attack Vector
Network
Атака возможна удалённо
Attack Complexity
Low
Легко эксплуатировать
Privileges Required
None
Права не нужны
User Interaction
None
Не нужно действие пользователя

Impact Assessment

Confidentiality
High
Полная утечка данных
Integrity
High
Полная модификация данных
Availability
High
Полный отказ в обслуживании

CVSS Vector v3.1