CVE-2026-42223 Details
Nginx UI is a web user interface for the Nginx web server. Prior to version 2.3.8, the GetSettings API handler (api/settings/settings.go:24-65) serializes all settings structs to JSON and returns them to authenticated users. Many sensitive fields are tagged with protected:"true" - however, this tag is only enforced during writes (via ProtectedFill in SaveSettings) and is completely ignored during reads. This exposes 40+ protected fields including JwtSecret (enabling auth token forgery), NodeSecret (enabling cluster node impersonation), OIDC ClientSecret (enabling OAuth account takeover), and the IP whitelist configuration. This issue has been patched in version 2.3.8.
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Exploit prediction scoring system (EPSS) score for CVE-2026-42223
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%).
0.3 Probability of exploitation activity being observed over the next 30 days (21th percentile)
CVSS score for CVE-2026-42223
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.
6.5 Medium
Products affected by CVE-2026-42223
Nginx Ui 2.0.0
Nginx Ui 2.2.0
Nginx Ui 2.1.4
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.
Low
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CVE-2026-42223 Global Footprint

Top 10 Identified Countries

Country Observations Percentage
ID 169 24.93%
CN 163 24.04%
US 84 12.39%
SG 38 5.60%
DE 35 5.16%
RU 33 4.87%
TH 17 2.51%
FR 16 2.36%
HK 14 2.06%
VN 12 1.77%

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CVE-2026-42223 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 307 85.75%
Telecommunications 42 11.73%
Retail 4 1.12%
Utilities 1 0.28%
Engineering 1 0.28%
Transportation 1 0.28%
Finance 1 0.28%
Education 1 0.28%

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