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CVE-2026-42223— nginx-ui: Settings API Exposes Protected Secrets

Quick assessment

Affected
0xJacky nginx-ui
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Nginx UI是Jacky个人开发者的一个 Nginx 的 WebUI。 Nginx UI 2.3.8之前版本存在信息泄露漏洞，该漏洞源于GetSettings API处理程序序列化所有设置结构并返回给认证用户，但受保护标签仅在写入时执行，可能导致40多个受保护字段暴露。

CVSS 6.5 · Medium EPSS 0.41% · P33

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage

Affected Version Matrix 1

VendorProduct Version RangeStatus
0xJacky nginx-ui < 2.3.8 affected
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I. Basic Information for CVE-2026-42223

Vulnerability Information
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Vulnerability Title
nginx-ui: Settings API Exposes Protected Secrets
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
Nginx UI 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Nginx UI是Jacky个人开发者的一个 Nginx 的 WebUI。 Nginx UI 2.3.8之前版本存在信息泄露漏洞，该漏洞源于GetSettings API处理程序序列化所有设置结构并返回给认证用户，但受保护标签仅在写入时执行，可能导致40多个受保护字段暴露。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
0xJacky nginx-ui < 2.3.8 -

II. Public POCs for CVE-2026-42223

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III. Intelligence Information for CVE-2026-42223

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Vendor Advisories for CVE-2026-42223 (1)

Other References for CVE-2026-42223 (1)

Same Patch Batch · 0xJacky · 2026-05-04 · 5 CVEs total

CVE-2026-42222 8.1 HIGH nginx-ui: Unauthenticated first-boot instance claim via POST /api/install allows remote bo
CVE-2026-42221 8.1 HIGH nginx-ui: Unauthenticated First-Run Installer Allows Remote Initial Admin Claim
CVE-2026-42220 6.5 MEDIUM nginx-ui: Authenticated settings disclosure exposes node.secret and enables trusted-node a
CVE-2026-42238 Unauthenticated Remote Code Execution via Backup Restore in nginx-ui

IV. Related Vulnerabilities

Same product: nginx-ui
Same vendor: 0xJacky
Same weakness: CWE-200

V. Comments for CVE-2026-42223

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