{"cvss":0.0,"datePublished":"2026-03-19T00:00:00Z","dateUpdated":"2026-03-19T00:00:00Z","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.","dueDate":"","id":"CVE-2026-27944","kev_catalogs":["vulncheck"],"knownRansomwareCampaignUse":"Unknown","product":"nginx_ui","requiredAction":"Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.","severity":"HIGH","source":"vulncheck_kev","title":"nginxui nginx_ui Missing Authentication for Critical Functionality","vendor":"nginxui"}