CVE-2026-27944
⛔ criticalSummary
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.
CVSS Score
9.8
Critical
EPSS Score
1.0
Exploit Probability
Published Date
2026-03-05
First Seen: 2026-03-06
📊 Relative Risk Intelligence
This CVE is Very High Risk - more severe than 90.5% of all 326,604 vulnerabilities in our database.
#31,067
Top 10% most severe
Severity Percentile
🎯 CISA SSVC Assessment Updated: Mar 6, 2026
🔍 Exploitation Status
None
No known exploits
⚙️ Automatable
YES
Can be exploited automatically
💥 Technical Impact
Total
Complete system compromise possible
SSVC data provided by
CISA
Last Modified
2026-03-10
Source
NVD 🔗
CVSS Vector 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H