CVE-2026-124484 (GCVE-0-2026-124484)

Vulnerability from cvelistv5 – Published: 2026-11-08 13:16 – Updated: 2026-11-08 13:16
VLAI
Title
OpenEMR before 8.4.0 Missing Authorization in Portal Onsite-Document APIs
Summary
OpenEMR before 8.4.0 contains a missing authorization vulnerability in portal onsite-document APIs that allows any authenticated core user to access cross-patient documents. Attackers can omit the patientId parameter and supply arbitrary record IDs to list, read, and overwrite other patients' portal documents, signatures, and template data.
Severity
8.7 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
Assigner
VulnCheck CNA
References
Impacted products
Vendor Product Version
openemr openemr Affected: 0 , < 8.4.0 (semver)
Unaffected: 8.4.0 (semver)
    cpe:2.3:a:open-emr:openemr:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-09-13 00:00
Credits
christos-cantina-security L0stHeart
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "openemr",
          "vendor": "openemr",
          "versions": [
            {
              "lessThan": "8.4.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "8.4.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:open-emr:openemr:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "8.4.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "christos-cantina-security"
        },
        {
          "lang": "en",
          "type": "finder",
          "value": "L0stHeart"
        }
      ],
      "datePublic": "2026-09-13T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "OpenEMR before 8.4.0 contains a missing authorization vulnerability in portal onsite-document APIs that allows any authenticated core user to access cross-patient documents. Attackers can omit the patientId parameter and supply arbitrary record IDs to list, read, and overwrite other patients\u0027 portal documents, signatures, and template data."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "LOW",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS"
        },
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "format": "CVSS"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-862",
              "description": "Missing Authorization",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-11-08T13:16:02.837Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
      "references": [
        {
          "name": "GitHub Security Advisory (GHSA-4r76-rq83-hgpg)",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://github.com/openemr/openemr/security/advisories/GHSA-4r76-rq83-hgpg"
        },
        {
          "name": "VulnCheck Advisory: OpenEMR before 8.4.0 Missing Authorization in Portal Onsite-Document APIs",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/openemr-before-8.4.0-missing-authorization-in-portal-onsite-document-apis"
        }
      ],
      "title": "OpenEMR before 8.4.0 Missing Authorization in Portal Onsite-Document APIs",
      "x_generator": {
        "engine": "vulncheck-endgame"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-124484",
    "datePublished": "2026-11-08T13:16:02.837Z",
    "dateReserved": "2026-11-08T02:17:31.141Z",
    "dateUpdated": "2026-11-08T13:16:02.837Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}



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