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CVE PROGRAM SOURCE RECORD9.8 Critical

CVE-2026-27944

Nginx UI: Unauthenticated Backup Download with Encryption Key Disclosure

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

0xJacky nginx-ui

  • < 2.3.3affected

References