Ghost 0.5.3 before 6.50.0 Cross-Site Scripting via ghost_head

{
  "id": "55d4b959ee8b7881a877c9743fc947b50f49165ab66c25a0d8635120c291059d",
  "url": "https://osv.dev/vulnerability/CVE-2026-103292",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Ghost 0.5.3 before 6.50.0 Cross-Site Scripting via ghost_head",
    "summary": "Ghost versions from 0.5.3 through versions prior to 6.50.0 fail to sanitize the data placed in the JSON-LD HTML tag emitted by the {{ghost_head}} helper. An authenticated user with limited privileges can inject unescaped content that is rendered as script in the published page, potentially leading to compromise of a staff user's admin session when that user views the affected page.",
    "evidence": "osv:CVE-2026-103292",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-103292",
      "aliases": [
        "BIT-ghost-2026-103292",
        "CVE-2026-103292",
        "GHSA-mp9q-4q6m-44f5"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/tryghost/ghost",
              "type": "GIT",
              "events": [
                {
                  "introduced": "dafda42e0a09aba132b6560c0a63cd6032b8fa92"
                },
                {
                  "fixed": "2adee64de295dde3be257fd3f22e503f577bb62c"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0.5.3"
                      },
                      {
                        "fixed": "6.50.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "6.50.0"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-103292.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:52.752942578Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/103xxx/CVE-2026-103292.json",
        "https://github.com/TryGhost/Ghost/security/advisories/GHSA-mp9q-4q6m-44f5",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-103292",
        "https://www.vulncheck.com/advisories/ghost-0.5.3-before-6.50.0-cross-site-scripting-via-ghost-head"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-79"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/103xxx/CVE-2026-103292.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-103292",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 521703,
  "published_at": "2026-10-01T10:42:25.235+00:00"
}