CVE-2026-42220: Nginx UI is a web user interface for the Nginx web server. Prior to version 2.3.8, an authenticated user can call GET…

CVE-2026-42220 · Severity: medium · CVSS 6.5 · Published 2026-05-04

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.

Technologies: github.com/0xJacky/Nginx-UI (Go), Nginxui Nginx Ui. Vendors: Go, Nginxui.

Quick answers

Is CVE-2026-42220 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-42220 being exploited in the wild.
How severe is CVE-2026-42220?
Medium severity, with a CVSS score of 6.5, published 4 May 2026.
Which products and versions are affected?
github.com/0xJacky/Nginx-UI (Go) SEMVER:introduced=0, SEMVER:introduced=0,last_affected=1.9.9.
Is there a fix for CVE-2026-42220?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
Am I affected by CVE-2026-42220?
Check whether you run github.com/0xJacky/Nginx-UI (Go) or Nginxui Nginx Ui at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Affected products

  • github.com/0xJacky/Nginx-UI (Go) SEMVER:introduced=0, SEMVER:introduced=0,last_affected=1.9.9
  • Nginxui Nginx Ui

Identifiers

  • CVE-2026-42220
  • GHSA-7jrr-xw9c-mj39
  • GO-2026-5227

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