{"cve":"CVE-2026-61628","nvd":{"published":"2026-09-21T15:17:30.290","modified":"2026-09-23T18:25:00.707","status":"Awaiting Analysis","description":"nginx ignition is a user interface for the nginx web server. Prior to version 2.41.1, `POST /api/users/onboarding/finish` is registered as anonymous (unauthenticated) and creates a user with full ReadWrite admin permissions. Because the handler uses a check-then-act (TOCTOU) pattern between the \"onboarding already completed?\" check and the user-creation write, with no atomic guard, a remote unauthenticated attacker who can reach an instance in its pre-onboarding state can create an administrator account for themselves — and concurrent requests can create multiple admin accounts in a single race. Version 2.41.1 patches the issue.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","score":8.1},"cwes":["CWE-362"],"references":["https://github.com/lucasdillmann/nginx-ignition/commit/0586b4e55ab780676d3553a2592979dfa2fb0183","https://github.com/lucasdillmann/nginx-ignition/security/advisories/GHSA-pxcx-fv34-x9p5","https://github.com/lucasdillmann/nginx-ignition/security/advisories/GHSA-pxcx-fv34-x9p5"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:55:23.253742848+00:00"},"epss":{"cve":"CVE-2026-61628","score":0.00434,"percentile":0.37747,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-pxcx-fv34-x9p5","url":"https://osv.dev/vulnerability/GHSA-pxcx-fv34-x9p5","summary":" nginx ignition has Unauthenticated Admin Account Creation via Onboarding Race Condition","modified":"2026-09-28T17:10:54.678370071Z","packages":[{"ecosystem":"Go","name":"github.com/lucasdillmann/nginx-ignition","purl":"pkg:golang/github.com/lucasdillmann/nginx-ignition","ranges":["<0.0.0-20260621194639-0586b4e55ab"],"fixed":["0.0.0-20260621194639-0586b4e55ab"]}]},{"id":"GO-2026-6540","url":"https://osv.dev/vulnerability/GO-2026-6540","summary":"nginx ignition has Unauthenticated Admin Account Creation via Onboarding Race Condition in github.com/lucasdillmann/nginx-ignition","modified":"2026-09-28T17:00:26.227151167Z","packages":[{"ecosystem":"Go","name":"github.com/lucasdillmann/nginx-ignition","purl":"pkg:golang/github.com/lucasdillmann/nginx-ignition","ranges":["all versions"],"fixed":[]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}