CVE-2026-42223

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.

Affected products

Nginx-Ui

Nginxui Nginx Ui

< 2.3.8

Fix

Available

CVSS 3.1

6.5 MEDIUM

EPSS

0.3% (22th percentile)

Weakness

CWE-200

NVD status

Analyzed

Published

2026-05-04

No exploit for CVE-2026-42223 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.