# nginx ignition has Unauthenticated Admin Account Creation via Onboarding Race Condition

Advisory record · `GHSA-pxcx-fv34-x9p5`

- **Identifiers:** `GHSA-pxcx-fv34-x9p5` · `CVE-2026-61628` · `GO-2026-6540`
- **State:** Confirmed
- **Severity:** CVSS 8.1 High
- **Critical:** No
- **Weakness (CWE):** [CWE-362](https://cwe.mitre.org/data/definitions/362.html)
- **Tags:** [Race condition](https://agentprime.io/advisories/tag/race-condition.md)
- **Published:** 21 Sept 2026
- **Updated:** 28 Sept 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 21 Sept 2026, 21:54 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `github.com/lucasdillmann/nginx-ignition` (Go): affected `<0.0.0-20260621194639-0586b4e55ab`; fixed in `0.0.0-20260621194639-0586b4e55ab`

## Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

> nginx ignition versions before 0.0.0-20260621194639-0586b4e55ab are affected. An unauthenticated remote attacker can create admin accounts on an instance that has not finished onboarding or had its onboarding reset. Upgrade to 0.0.0-20260621194639-0586b4e55ab and finish onboarding promptly after deployment.

Written 1 Nov 2026.

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

- 8.1 High, CVSS 3.1: `CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H`, from CNA (GitHub_M)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0043, the 37th percentile, on 8 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 14:12 UTC: First seen by agentprime
- 31 Oct 2026, 14:12 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-pxcx-fv34-x9p5)

## Sources

- [GitHub Advisory Database: GHSA-pxcx-fv34-x9p5](https://github.com/advisories/GHSA-pxcx-fv34-x9p5)
- [OSV: GHSA-pxcx-fv34-x9p5](https://osv.dev/vulnerability/GHSA-pxcx-fv34-x9p5)
- <https://github.com/lucasdillmann/nginx-ignition/security/advisories/GHSA-pxcx-fv34-x9p5>
- <https://nvd.nist.gov/vuln/detail/CVE-2026-61628>
- <https://github.com/lucasdillmann/nginx-ignition/pull/131>
- <https://github.com/lucasdillmann/nginx-ignition/commit/0586b4e55ab780676d3553a2592979dfa2fb0183>
- <https://github.com/lucasdillmann/nginx-ignition>
- <https://github.com/lucasdillmann/nginx-ignition/releases/tag/2.41.1>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-pxcx-fv34-x9p5>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-pxcx-fv34-x9p5/>. Everything for agents: <https://agentprime.io/llms.txt>.