Ghost: Paid gift memberships obtainable at minimal cost via the donations feature

{
  "id": "ee63754fcf37289bdc699aac899dd5853d8febabd3c0a55a9f76c3ca56f723dd",
  "url": "https://osv.dev/vulnerability/CVE-2026-59817",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Ghost: Paid gift memberships obtainable at minimal cost via the donations feature",
    "summary": "Ghost is a Node.js content management system. From 6.27.0 before 6.44.0, Ghost's public donation checkout flow allowed an unauthenticated attacker to control donation checkout metadata and obtain full paid gift memberships for a minimal payment without exposing customer or member data or stealing money from a site or its members. This issue is fixed in version 6.44.0.",
    "evidence": "osv:CVE-2026-59817",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-59817",
      "aliases": [
        "BIT-ghost-2026-59817",
        "CVE-2026-59817",
        "GHSA-xm43-3m56-w3wf"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/tryghost/ghost",
              "type": "GIT",
              "events": [
                {
                  "introduced": "2daa6eba775c961ca41f2732b622d9deb86a39ee"
                },
                {
                  "fixed": "42dd01fb05574217adc8b77bb2bbc85149c332b0"
                },
                {
                  "fixed": "cab716cd015ac04b7ee50c7a405478d97bc7b1e0"
                },
                {
                  "fixed": "ee7b991b466a7849c70f9d1caed8e491ee4113c6"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "6.27.0"
                      },
                      {
                        "fixed": "6.44.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "cab716cd015ac04b7ee50c7a405478d97bc7b1e0"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "ee7b991b466a7849c70f9d1caed8e491ee4113c6"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v6.43.1",
            "v6.43.0",
            "v6.42.0",
            "v6.41.1",
            "v6.41.0",
            "v6.40.0",
            "v6.39.0",
            "v6.38.0",
            "v6.37.1",
            "v6.37.0",
            "v6.36.0",
            "v6.35.0",
            "v6.34.0",
            "v6.33.0",
            "v6.32.0",
            "v6.31.0",
            "v6.30.0",
            "v6.29.1",
            "v6.29.0",
            "v6.28.0",
            "v6.27.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-59817.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:37.184626321Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/59xxx/CVE-2026-59817.json",
        "https://github.com/TryGhost/Ghost/security/advisories/GHSA-xm43-3m56-w3wf",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-59817",
        "https://github.com/TryGhost/Ghost/commit/cab716cd015ac04b7ee50c7a405478d97bc7b1e0",
        "https://github.com/TryGhost/Ghost/commit/ee7b991b466a7849c70f9d1caed8e491ee4113c6",
        "https://github.com/TryGhost/Ghost/pull/28351",
        "https://github.com/TryGhost/Ghost/pull/28352"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-472",
          "CWE-639"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/59xxx/CVE-2026-59817.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-59817",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 504476,
  "published_at": "2026-07-09T17:40:15.629+00:00"
}