CVE-2026-25146

Comprehensive Technical Analysis of CVE-2026-25146

1. Vulnerability Assessment and Severity Evaluation

CVE ID: CVE-2026-25146

Description: OpenEMR, a widely-used open-source electronic health records (EHR) and medical practice management application, has a critical vulnerability in versions 5.0.2 to 7.9.9. The vulnerability involves the exposure of the gateway_api_key secret value in plaintext to the client. This exposure can lead to unauthorized access to payment gateway APIs, potentially resulting in arbitrary money movement or broad account takeover.

CVSS Score: 9.6

Severity Evaluation:

• Confidentiality Impact: High
• Integrity Impact: High
• Availability Impact: High
• Exploitability: High
• Remediation Level: Official-Fix

The high CVSS score of 9.6 indicates a critical vulnerability that requires immediate attention. The exposure of sensitive API keys can have severe financial and operational impacts, making this a high-priority issue for organizations using OpenEMR.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

1. Network Sniffing: An attacker could intercept network traffic to capture the plaintext API keys.
2. Client-Side Scripting: Malicious scripts injected into the client-side application could extract the API keys.
3. Man-in-the-Middle (MitM) Attacks: An attacker could intercept and modify communications between the client and the server to capture the API keys.

Exploitation Methods:

1. Unauthorized API Access: With the captured API keys, an attacker could gain unauthorized access to payment gateway APIs.
2. Financial Fraud: The attacker could initiate unauthorized financial transactions, leading to financial loss.
3. Account Takeover: The attacker could take over user accounts, leading to broader unauthorized access and potential data breaches.

3. Affected Systems and Software Versions

Affected Versions: OpenEMR versions 5.0.2 to 7.9.9

Fixed Version: OpenEMR 8.0.0

Organizations using OpenEMR within the affected version range are at risk and should prioritize updating to version 8.0.0 or applying the necessary patches.

4. Recommended Mitigation Strategies

1. Immediate Patching: Upgrade to OpenEMR version 8.0.0, which includes the fix for this vulnerability.
2. Network Security: Implement robust network security measures, including encryption and secure communication protocols (e.g., HTTPS).
3. Monitoring and Logging: Enhance monitoring and logging to detect any unauthorized access or suspicious activities related to payment gateway APIs.
4. Access Controls: Implement strict access controls and regular audits of API key usage.
5. User Education: Educate users about the risks of exposing sensitive information and best practices for securing API keys.

5. Impact on Cybersecurity Landscape

The exposure of sensitive API keys in plaintext highlights a critical gap in the security practices of many applications, particularly in the healthcare sector. This vulnerability underscores the importance of:

1. Secure Coding Practices: Ensuring that sensitive information is never exposed in plaintext.
2. Regular Security Audits: Conducting regular security audits and vulnerability assessments.
3. Incident Response: Having a robust incident response plan to quickly address and mitigate vulnerabilities.

6. Technical Details for Security Professionals

Vulnerable Code Paths:

1. front_payment.php: Line 765

   echo $gateway_api_key;
   

2. portal_payment.php: Line 537

   echo $gateway_api_key;
   

Fix Commit:

• Commit Hash: fe6341496dc82d5b4f5a3f35891bb2e2481f3b25
• Changes: The fix involves ensuring that the gateway_api_key is not rendered to the client in plaintext. Instead, it should be securely handled and stored.

Security Advisory:

• URL: GHSA-2hq8-wc73-jvvq

Recommendations for Developers:

1. Secure Storage: Use secure storage mechanisms for sensitive information, such as environment variables or secure vaults.
2. Encryption: Ensure that all sensitive data is encrypted both in transit and at rest.
3. Code Reviews: Implement rigorous code reviews and static analysis tools to detect and prevent such vulnerabilities.

Conclusion

CVE-2026-25146 represents a critical vulnerability in OpenEMR that could lead to significant financial and operational impacts. Organizations using affected versions should prioritize upgrading to version 8.0.0 and implement additional security measures to mitigate risks. This vulnerability serves as a reminder of the importance of secure coding practices and regular security assessments in maintaining a robust cybersecurity posture.