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CVE-2026-27944 (GCVE-0-2026-27944)

Vulnerability from cvelistv5 – Published: 2026-03-05 16:28 – Updated: 2026-03-19 14:49
VLAI
Title
Nginx UI: Unauthenticated Backup Download with Encryption Key Disclosure
Summary
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.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: poc Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-19 14:48 UTC
CWE
  • CWE-311 - Missing Encryption of Sensitive Data
  • CWE-306 - Missing Authentication for Critical Function
Assigner
References
Impacted products
Vendor Product Version CPE status
0xJacky nginx-ui Affected: < 2.3.3
guessed Create a notification for this product.
Show details on NVD website
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