What is CVE-2026-42223?

CVE-2026-42223 is a medium-severity vulnerability in 0xjacky Nginx-ui, classified under Information Disclosure. CVSS score: 6.5/10. Published 2026-05-04.

How severe is CVE-2026-42223?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Information disclosure in 0xjacky Nginx-ui

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…

Vulnerability class: Information Disclosure

EPSS: 0.000 (11.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

Affected products

0xjacky Nginx-ui — versions < 2.3.8
Nginxui Nginx_ui

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-q4w7-56hr-83rm (x_refsource_CONFIRM, Exploit, Vendor Advisory)
https://github.com/0xJacky/nginx-ui/releases/tag/v2.3.8 (x_refsource_MISC, Release Notes)

Frequently asked questions

What is CVE-2026-42223?: CVE-2026-42223 is a medium-severity vulnerability in 0xjacky Nginx-ui, classified under Information Disclosure. CVSS score: 6.5/10. Published 2026-05-04.
How severe is CVE-2026-42223?: Medium severity. CVSS v3 base score is 6.5 out of 10.