Is CVE-2026-42223 actively exploited?

No active exploitation of CVE-2026-42223 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-42223 be exploited remotely?

Yes. CVE-2026-42223 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-42223?

CVE-2026-42223 has a CVSS score of 6.5 (MEDIUM).

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MEDIUM

CVE-2026-42223

CWE-200Published: May 4, 2026· Updated: May 6, 2026

6.5

CVSS v3.1

EPSS:0.03%probability of exploitation in 30 daysPercentile:8.7th

Official 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.

NVD Source

Technical Analysis

CVE-2026-42223 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 6.5.

From a weakness classification perspective (CWE-200): Information exposure vulnerabilities leak sensitive data to unauthorized actors.