CVE-2026-42221
critical
CVSS v3
9.8
CVSS v2
—
VIR risk
9.8
Description
Nginx-UI: Unauthenticated First-Run Installer Allows Remote Initial Admin Claim
Predictions
Exploit likelihood
97%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: security-advisories@github.com — https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-h27v-ph7w-m9fp
Vendor advisory: security-advisories@github.com — https://github.com/0xJacky/nginx-ui/releases/tag/v2.3.8
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| Go | github.com/0xJacky/Nginx-UI | >=2.0.0,<2.3.8 | 2.3.8 |
| GO | github.com/0xJacky/Nginx-UI | >= 2.0.0, <= 2.3.5 | 2.3.8 |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| nginxui | nginx_ui | {"startIncluding":"2.0.0","endExcluding":"2.3.8"} | 2.3.8 |
References
CWEs
CWE-306
Verify integrity in audit chain (admin only). AS-IS.