OpenEMR up to 8.4.x Patient Validation mf_lname/mf_ missing authentication

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.3$0-$5k0.00+

Summaryinfo

A vulnerability was found in OpenEMR up to 8.4.x. It has been rated as problematic. This affects an unknown function of the component Patient Validation Module. This manipulation of the argument mf_lname/mf_ causes missing authentication. This vulnerability is tracked as CVE-2026-126415. The attack is possible to be carried out remotely. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as problematic was found in OpenEMR up to 8.4.x. Affected by this vulnerability is an unknown function of the component Patient Validation Module. The manipulation of the argument mf_lname/mf_ with an unknown input leads to a missing authentication vulnerability. The CWE definition for the vulnerability is CWE-306. The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources. As an impact it is known to affect confidentiality. The summary by CVE is:

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.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-126415 since 11/10/2026. The exploitation appears to be easy. The attack can be launched remotely. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 8.5.0 eliminates this vulnerability.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.3

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 6.5
CNA Vector (VulnCheck): 🔒

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Missing authentication
CWE: CWE-306 / CWE-287
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: OpenEMR 8.5.0

Timelineinfo

11/10/2026 CVE reserved
11/13/2026 +3 days Advisory disclosed
11/13/2026 +0 days VulDB entry created
11/13/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Confirmed

CNA: VulnCheck
CVE: CVE-2026-126415 (🔒)

GCVE (CVE): GCVE-0-2026-126415
GCVE (VulDB): GCVE-100-436807

Entryinfo

Created: 11/13/2026 11:32
Changes: 11/13/2026 11:32 (77)
Complete: 🔍
Cache ID: 216::103

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