Jenkins — security advisory

{
  "id": "7622776a0b1d0591bf094e60ce00d5c96ba7602058d722a92d8cef2af78f1618",
  "url": "https://www.cve.org/CVERecord?id=CVE-2026-117618",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-117618",
    "summary": "In Jenkins 2.587 and earlier, LTS 2.580.1 and earlier, the HTTP endpoint for creating the first user account does not check whether the setup wizard has been completed, resulting in a race condition that allows unauthenticated attackers to create an administrator account while the initial user account is being replaced.",
    "evidence": "cve:CVE-2026-117618",
    "products": [
      {
        "name": {
          "value": "Jenkins",
          "evidence": "/containers/cna/affected/0/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-117618",
      "aliases": [
        "CVE-2026-117618"
      ],
      "metrics": [],
      "affected": [
        {
          "vendor": "Jenkins Project",
          "product": "Jenkins",
          "versions": [
            {
              "status": "unaffected",
              "version": "2.588",
              "lessThan": "*",
              "versionType": "maven"
            },
            {
              "status": "unaffected",
              "version": "2.580.2",
              "lessThan": "2.580.*",
              "versionType": "maven"
            }
          ],
          "defaultStatus": "affected"
        }
      ],
      "modified": "2026-10-28T16:48:32.556Z",
      "provider": "cve",
      "references": [
        "https://www.jenkins.io/security/advisory/2026-10-28/#SECURITY-4122"
      ],
      "provider_metadata": {
        "cna": {
          "orgId": "39769cd5-e6e2-4dc8-927e-97b3aa056f5b",
          "shortName": "jenkins",
          "dateUpdated": "2026-10-28T16:48:32.556Z"
        }
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-117618",
        "evidence": "/cveMetadata/cveId"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-cve",
  "document_id": 461109,
  "published_at": "2026-10-28T16:48:32.556+00:00"
}