CVE-2026-61628

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Source
https://cve.org/CVERecord?id=CVE-2026-61628
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-61628.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-61628
Aliases
Downstream
Published
2026-09-21T14:44:54Z
Modified
2026-09-23T03:45:56Z
Severity
  • 8.1 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
nginx ignition has Unauthenticated Admin Account Creation via Onboarding Race Condition
Details

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.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-362"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/61xxx/CVE-2026-61628.json"
}
References

Affected packages

Git / github.com/lucasdillmann/nginx-ignition

Affected ranges

Type
GIT
Repo
https://github.com/lucasdillmann/nginx-ignition
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
0586b4e55ab780676d3553a2592979dfa2fb0183
Database specific
Show details 
{
    "extracted_events":  [
        {
            "introduced":  "0"
        },
        {
            "fixed":  "2.41.1"
        }
    ],
    "source":  [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

1.*
1.0.0
1.1.0
1.2.0
1.3.0
1.4.0
1.5.0
1.5.1
1.6.0
1.7.0
1.7.1
2.*
2.0.0
2.0.1
2.0.2
2.1.0
2.1.1
2.10.0
2.10.1
2.11.0
2.11.1
2.12.0
2.13.0
2.13.1
2.14.0
2.15.1
2.16.0
2.17.0
2.17.1
2.18.0
2.18.1
2.19.0
2.2.0
2.20.0
2.20.1
2.20.2
2.21.0
2.22.0
2.23.0
2.24.0
2.25.0
2.25.1
2.26.0
2.27.0
2.27.1
2.28.0
2.29.0
2.29.1
2.3.0
2.3.1
2.30.0
2.31.0
2.31.1
2.31.2
2.32.0
2.33.0
2.34.0
2.35.0
2.35.1
2.35.2
2.35.3
2.36.0
2.36.1
2.37.0
2.38.0
2.39.0
2.4.0
2.4.1
2.4.2
2.40.0
2.40.1
2.41.0
2.5.0
2.6.0
2.7.0
2.8.0
2.9.0
2.9.1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-61628.json"