CVE-2026-42222
nginx-ui: Unauthenticated first-boot instance claim via POST /api/install allows remote bootstrap takeover
CVSS Score
8.1
EPSS Score
0.0%
EPSS Percentile
0th
Nginx UI is a web user interface for the Nginx web server. In version 2.3.5, an unauthenticated bootstrap takeover exists in nginx-ui during the initial installation window exposed by POST /api/install. At time of publication no public patches are available.
| CWE | CWE-306 CWE-284 |
| Vendor | 0xjacky |
| Product | nginx-ui |
| Published | May 4, 2026 |
| Last Updated | May 4, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
0xJacky / nginx-ui
= 2.3.5