CVE-2026-27944 Details
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.
View at NVD
Exploit prediction scoring system (EPSS) score for CVE-2026-27944
EPSS (Exploit Prediction Scoring System): EPSS predicts the likelihood that a vulnerability will be exploited in the wild. A higher percentage means a greater chance of an exploit occurring. The EPSS model produces a probability score between 0 and 1 (0 and 100%).
7.4 Probability of exploitation activity being observed over the next 30 days (92st percentile)
CVSS score for CVE-2026-27944
CVSS (Common Vulnerability Scoring System): An open framework owned and managed by FIRST.Org, Inc. that assigns a numerical score from 0 to 10 to software vulnerabilities to indicate their severity.
9.8 Critical
Products affected by CVE-2026-27944
Nginx Ui 2.0.0
DVE Score by Bitsight AI
DVE scores complement traditional static scoring systems like CVSS with Bitsight AI powered real-time threat intelligence and underground cyber criminal activity so that security teams can reduce alert fatigue and focus on vulnerabilities most likely to be exploited.
Critical
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CVE-2026-27944 Global Footprint

Top 10 Identified Countries

Country Observations Percentage
ID 77 43.26%
CN 39 21.91%
US 11 6.18%
SG 6 3.37%
BR 4 2.25%
RU 4 2.25%
HK 4 2.25%
VN 3 1.69%
CZ 3 1.69%
DE 3 1.69%

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CVE-2026-27944 Industry Footprint

Top 10 Identified Industries

*Service provider organizations (typically Technology and Telecommunications) are disproportionally represented in the results given their upstream ownership of end-user infrastructure. See our FAQs.

Industry* Observations Percentage
Technology 54 77.14%
Telecommunications 12 17.14%
Retail 3 4.29%
Education 1 1.43%

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