CVE-2026-42223— nginx-ui: Settings API Exposes Protected Secrets
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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: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
信息暴露
Source: NVD (National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-42223
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- Release v2.3.8 · 0xJacky/nginx-ui · GitHubx_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2026-42223
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
- CVE-2026-42238
Unauthenticated Remote Code Execution via Backup Restore in - CVE-2026-42222
nginx-ui: Unauthenticated first-boot instance claim via POST - CVE-2026-42221
nginx-ui: Unauthenticated First-Run Installer Allows Remote - CVE-2026-42220
nginx-ui: Authenticated settings disclosure exposes node.sec - CVE-2026-34403
Nginx-UI vulnerable to Cross-Site WebSocket Hijacking (CSWSH
Same vendor: 0xJacky
- CVE-2026-42238
Unauthenticated Remote Code Execution via Backup Restore in - CVE-2026-42222
nginx-ui: Unauthenticated first-boot instance claim via POST - CVE-2026-42221
nginx-ui: Unauthenticated First-Run Installer Allows Remote - CVE-2026-42220
nginx-ui: Authenticated settings disclosure exposes node.sec - CVE-2026-34403
Nginx-UI vulnerable to Cross-Site WebSocket Hijacking (CSWSH
Same weakness: CWE-200
- CVE-2026-42456
AnythingLLM: Cross-User TTS Audio Disclosure via Chat ID (ID - CVE-2026-41520
Cillium exposes sensitive information included in the cilium - CVE-2026-25199
Apache CloudStack: Proxmox Extension Allows Unauthorized Cro - CVE-2026-43942
electerm: Full process.env exposed to renderer via window.pr - CVE-2026-42880
ArgoCD ServerSideDiff is vulnerable to Kubernetes Secret Ext
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