OpenEMR before 8.5.0 contains a missing authorization vulnerability in the Patient Validation module that allows any authenticated user to retrieve patient demographic records. Attackers can send direct requests with wildcard mf_lname or empty mf_ parameters to the patientvalidation endpoint to enumerate the entire patient_data table.
{
"cna_assigner": "VulnCheck",
"cwe_ids": [
"CWE-862"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/126xxx/CVE-2026-126415.json"
}{
"extracted_events": [
{
"range": [
{
"introduced": "0"
},
{
"fixed": "8.5.0"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
}
]
}