{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": [
              "cpe:2.3:a:n8n:n8n:*:*:*:*:*:node.js:*:*",
              "cpe:2.3:a:n8n:n8n:2.28.0:*:*:*:*:node.js:*:*"
            ],
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "1.123.61"
              },
              {
                "introduced": "2.0.0"
              },
              {
                "fixed": "2.27.4"
              },
              {
                "introduced": "2.28.0"
              },
              {
                "last_affected": "2.28.0"
              }
            ],
            "source": [
              "CPE_RANGE",
              "CPE_STRING"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2320517c9a1ec061e722bfcb153b9dd4eccc9f27"
            },
            {
              "introduced": "a8ecda44f7627630bc8b78cf671405157ad41c4f"
            },
            {
              "fixed": "a4d0dfce294064026be1a6a246e6da348fea1485"
            },
            {
              "introduced": "0dac8a2785e76c0742efe2c427605fe5b91f9b5e"
            },
            {
              "last_affected": "0dac8a2785e76c0742efe2c427605fe5b91f9b5e"
            }
          ],
          "repo": "https://github.com/n8n-io/n8n",
          "type": "GIT"
        }
      ],
      "versions": [
        "2.28.0"
      ]
    }
  ],
  "aliases": [
    "GHSA-75qm-gp28-rcq9"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-1321"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/59xxx/CVE-2026-59206.json"
  },
  "details": "n8n is an open source workflow automation platform. Prior to 1.123.61, 2.27.4, and, 2.28.1, an authenticated user with the default workflow:create permission could pollute Object.prototype through a crafted workflow saved, updated, or imported via the workflow API, allowing unauthenticated requests to be treated as a privileged user and exposing user and project listing endpoints. This issue is fixed in versions 1.123.61, 2.27.4, and 2.28.1.",
  "id": "CVE-2026-59206",
  "modified": "2026-08-07T11:31:15.024772530Z",
  "published": "2026-07-09T15:30:28.166Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/n8n-io/n8n/releases/tag/n8n%402.27.4"
    },
    {
      "type": "WEB",
      "url": "https://github.com/n8n-io/n8n/releases/tag/n8n%402.28.1"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/59xxx/CVE-2026-59206.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/n8n-io/n8n/security/advisories/GHSA-75qm-gp28-rcq9"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-59206"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:L/SI:L/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "n8n: Prototype Pollution via Workflow Credentials Leads to Unauthenticated User and Project Enumeration"
}