{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "1.0.0-rc.16"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "56ae2ca3bf36c8299a4b3d376c6a20e8c0ed5ba9"
            },
            {
              "fixed": "66d13046175f4d6d7176db1c28a695cf3bd8d864"
            }
          ],
          "repo": "https://github.com/getgrav/grav-plugin-api",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-93px-98wh-6fj2"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-942"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63407.json"
  },
  "details": "Grav API Plugin is a RESTful API for Grav CMS that provides full headless access to your site's content. Prior to 1.0.0-rc.16, the Grav API plugin CorsMiddleware returns Access-Control-Allow-Origin: * and permissive OPTIONS responses for authenticated /api/v1 endpoints. JavaScript from any origin can submit an attacker-obtained JWT through the Authorization or X-API-Token header, read the authenticated response, and perform write operations with the token owner's privileges, enabling data exfiltration and account modification. This issue is fixed in version 1.0.0-rc.16.",
  "id": "CVE-2026-63407",
  "modified": "2026-09-11T03:31:02.994027876Z",
  "published": "2026-08-19T15:51:36.784Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/getgrav/grav-plugin-api/releases/tag/1.0.0-rc.16"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63407.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/getgrav/grav/security/advisories/GHSA-93px-98wh-6fj2"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63407"
    },
    {
      "type": "FIX",
      "url": "https://github.com/getgrav/grav-plugin-api/commit/56ae2ca3bf36c8299a4b3d376c6a20e8c0ed5ba9"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Grav API Plugin: CORS 'Access-Control-Allow-Origin: *' on Authenticated API Responses"
}