Auth bypass in 0xjacky Nginx-Ui
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 /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.
Vulnerability class: Information Disclosure
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.004 (31.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 31st percentile — 31.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001
Affected products
- 0xjacky Nginx-Ui — versions < 2.3.8
- Nginxui nginx Ui
Weakness classification (CWE)
References
- github.com/0xJacky/nginx-ui/security/advisories/GHSA-7jrr-xw9c-mj39 (Exploit, Vendor Advisory)
- github.com/0xJacky/nginx-ui/releases/tag/v2.3.8 (Release Notes)
Frequently asked questions
- What is CVE-2026-42220?
- CVE-2026-42220 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-2026-42220?
- Medium severity. CVSS v3 base score is 6.5 out of 10.