CVE ID :CVE-2026-42221 Published : May 4, 2026, 9:16 p.m. | 58 minutes ago Description :Nginx UI is a web user interface for the Nginx web server. From version 2.0.0 to before version 2.3.8, an unauthenticated network attacker can claim the initial administrator account on a fresh nginx-ui instance during the first-run setup window. The public /api/install endpoint is reachable without authentication, and the request-encryption flow only protects payload confidentiality in transit; it does not authenticate who is allowed to perform installation. A remote attacker who reaches the service before the legitimate operator can set the admin email, username, and password, causing permanent initial-instance takeover. This issue has been patched in version 2.3.8. Severity: 8.1 | HIGH Visit the link for more details, such as CVSS details, affected products, timeline, and more...