Answer in brief
CVE-2026-61628 records a High severity (CVSS 8.1) vulnerability in nginx ignition has Unauthenticated Admin Account Creation via Onboarding Race Condition. The current sources do not mark it as known exploited. The current feed maps lucasdillmann/nginx-ignition (generic), github.com/lucasdillmann/nginx-ignition (go), github.com/lucasdillmann/nginx-ignition (go). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 8.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps lucasdillmann/nginx-ignition (generic), github.com/lucasdillmann/nginx-ignition (go), github.com/lucasdillmann/nginx-ignition (go). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| lucasdillmann/nginx-ignitiongeneric | <2.41.1 | 2.41.1 |
| github.com/lucasdillmann/nginx-ignitiongo | <0.0.0-20260621194639-0586b4e55ab | 0.0.0-20260621194639-0586b4e55ab |
| github.com/lucasdillmann/nginx-ignitiongo | >=0 | Not reported |
Published upstream
Sep 21, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 28, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 21, 2026
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.
Quoted source text, attributed separately from HOL analysis.