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CVE-2026-42220— nginx-ui: Authenticated settings disclosure exposes node.secret and enables trusted-node authentication abuse, backup exfiltration, and restore-based nginx-ui state rollback

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，该漏洞源于认证用户可调用GET /api/settings检索敏感配置值，包括node.secret，可能导致请求被视为通过可信节点路径认证。

CVSS 6.5 · Medium EPSS 0.40% · P32

Affected Version Matrix 1

VendorProduct Version RangeStatus
0xJacky nginx-ui < 2.3.8 affected
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I. Basic Information for CVE-2026-42220

Vulnerability Information
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Vulnerability Title
nginx-ui: Authenticated settings disclosure exposes node.secret and enables trusted-node authentication abuse, backup exfiltration, and restore-based nginx-ui state rollback
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, an authenticated user can call GET /api/settings and retrieve sensitive configuration values, including node.secret. The same node.secret is accepted by AuthRequired() through the X-Node-Secret header (or node_secret query parameter), causing the request to be treated as authenticated via the trusted-node path and associated with the init user. 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，该漏洞源于认证用户可调用GET /api/settings检索敏感配置值，包括node.secret，可能导致请求被视为通过可信节点路径认证。
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-2026-42220

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III. Intelligence Information for CVE-2026-42220

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Other References for CVE-2026-42220 (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-2026-42223 6.5 MEDIUM nginx-ui: Settings API Exposes Protected Secrets
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-2026-42220

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