{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "0"
              },
              {
                "fixed": "8.0.0.3"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7c96c8eefe460d6fadbccbe93d0fa6bf819acd69"
            }
          ],
          "repo": "https://github.com/openemr/openemr",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-w9w5-7x6h-657q"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-639",
      "CWE-862"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33934.json"
  },
  "details": "OpenEMR is a free and open source electronic health records and medical practice management application. Versions prior to 8.0.0.3 have a missing authorization check in `portal/sign/lib/show-signature.php` that allows any authenticated patient portal user to retrieve the drawn signature image of any staff member by supplying an arbitrary `user` value in the POST body. The companion write endpoint (`save-signature.php`) was already hardened against this same issue, but the read endpoint was not updated to match. Version 8.0.0.3 patches the issue.",
  "id": "CVE-2026-33934",
  "modified": "2026-04-01T23:08:28.744186648Z",
  "published": "2026-03-25T23:41:51.601Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33934.json"
    },
    {
      "type": "FIX",
      "url": "https://github.com/openemr/openemr/commit/ae7ee1872d2e6300b165e24687cc90cf6847a4e5"
    },
    {
      "type": "WEB",
      "url": "https://github.com/openemr/openemr/releases/tag/v8_0_0_3"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/openemr/openemr/security/advisories/GHSA-w9w5-7x6h-657q"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33934"
    }
  ],
  "schema_version": "1.7.3",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "OpenEMR's Missing Authorization in show-signature.php Allows Portal Patients to Read Staff Signatures"
}