{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "1.1.4"
              },
              {
                "fixed": "15.0.1"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "680e1393cffed9b4640e8f2a7885b6d1bd805d05"
            },
            {
              "fixed": "62086b0dd71be392fce34e95e3d1c8d05d60bf43"
            },
            {
              "fixed": "0a927a4f8d228dd05ee7ca4be32899bc190e73af"
            }
          ],
          "repo": "https://github.com/tinacms/tinacms",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-g74q-6g2f-874x"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-639"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63506.json"
  },
  "details": "Tina is a headless content management system. Prior to @tinacms/auth 1.1.4 and next-tinacms-azure 15.0.1, isAuthorized accepts a request-controlled clientID and asks isUserAuthorized to validate the bearer token against that selected TinaCloud app instead of the self-hosted site's configured app. An attacker with any TinaCloud account can submit the attacker's own app ID and valid token to a victim endpoint, causing TinaCloudBackendAuthProvider or an affected media authorized callback to accept the attacker's verified status across the tenant boundary. The vulnerable logic is present in packages/@tinacms/auth/src/index.ts and packages/next-tinacms-azure/src/auth.ts. Successful exploitation permits media listing, reading, upload, or deletion and, when TinaCloudBackendAuthProvider is used, GraphQL read, create, update, and delete operations on the victim's content without a victim account or victim interaction. This vulnerability is fixed in @tinacms/auth 1.1.4 and next-tinacms-azure 15.0.1.",
  "id": "CVE-2026-63506",
  "modified": "2026-09-19T03:30:45.591827305Z",
  "published": "2026-09-16T20:27:37.385Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/tinacms/tinacms/releases/tag/@tinacms/auth@1.1.4"
    },
    {
      "type": "WEB",
      "url": "https://github.com/tinacms/tinacms/releases/tag/next-tinacms-azure@15.0.1"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63506.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/tinacms/tinacms/security/advisories/GHSA-g74q-6g2f-874x"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63506"
    },
    {
      "type": "FIX",
      "url": "https://github.com/tinacms/tinacms/commit/0a927a4f8d228dd05ee7ca4be32899bc190e73af"
    },
    {
      "type": "FIX",
      "url": "https://github.com/tinacms/tinacms/pull/7168"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Tina: [Broken Access Control] letting any TinaCloud user authorize against any self-hosted site"
}