{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "0"
                  },
                  {
                    "fixed": "8.4.0"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "53d885e56d4772b4e48810a1f98531c5d19a934d"
            }
          ],
          "repo": "https://github.com/openemr/openemr",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-6xh3-fmm5-jjp4"
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-863"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/126xxx/CVE-2026-126473.json"
  },
  "details": "OpenEMR before 8.4.0 contains OAuth scope canonicalization and containment flaws that allow unauthenticated attackers to obtain unapproved system-level FHIR access. Attackers can register a colon-form system:Patient.read client that bypasses approval, then request unregistered system/Patient.write scope to read, modify, and create Patient records.",
  "id": "CVE-2026-126473",
  "modified": "2026-11-14T10:30:52.523761482Z",
  "published": "2026-11-13T09:34:58.505Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/126xxx/CVE-2026-126473.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/openemr/openemr/security/advisories/GHSA-6xh3-fmm5-jjp4"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-126473"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/openemr-before-8.4.0-oauth-authorization-bypass-via-scope-canonicalization"
    }
  ],
  "schema_version": "1.9.2",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "OpenEMR before 8.4.0 OAuth Authorization Bypass via Scope Canonicalization"
}