{"id":"CVE-2026-42222","summary":"nginx-ui: Unauthenticated first-boot instance claim via POST /api/install allows remote bootstrap takeover","details":"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.","aliases":["GHSA-mxqh-q9h6-v8pq","GO-2026-5521"],"modified":"2026-07-15T01:48:58.212532406Z","published":"2026-05-04T20:11:11.049Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-284","CWE-306"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42222.json"},"references":[{"type":"ADVISORY","url":"https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-mxqh-q9h6-v8pq"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42222.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-42222"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/0xjacky/nginx-ui","events":[{"introduced":"1a9cd29a308278173aa0f16234cb78061dd2bd42"},{"last_affected":"1a9cd29a308278173aa0f16234cb78061dd2bd42"}],"database_specific":{"source":["AFFECTED_FIELD","CPE_STRING"],"cpe":"cpe:2.3:a:nginxui:nginx_ui:2.3.5:*:*:*:*:*:*:*","extracted_events":[{"introduced":"= 2.3.5"},{"last_affected":"= 2.3.5"},{"introduced":"2.3.5"},{"last_affected":"2.3.5"}]}}],"versions":["2.3.5","= 2.3.5","v2.3.5"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-42222.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}