The vulnerability identified as CVE-2026-2134 affects PHPGurukul Hospital Management System version 4.0, specifically within the /hms/admin/manage-doctors.php script. The flaw is an SQL injection caused by improper handling of the 'ID' parameter, which is likely used to identify doctor records. An attacker with authenticated high privileges can manipulate this parameter to inject malicious SQL commands, potentially allowing unauthorized data access, modification, or deletion within the backend database. The attack vector is remote network access, and no user interaction is required once authenticated. The CVSS 4.0 vector indicates no privileges are required (PR:H means high privileges are required), no user interaction, and low impact on confidentiality, integrity, and availability, suggesting limited but non-negligible damage potential. Although no public exploits are currently observed in the wild, the public disclosure of the vulnerability increases the risk of exploitation. The lack of available patches necessitates immediate mitigation through input validation, parameterized queries, or restricting access to the affected functionality. This vulnerability is critical in healthcare environments where patient data confidentiality and system integrity are paramount. Exploitation could lead to unauthorized disclosure of sensitive patient information or disruption of hospital operations.

For European organizations, particularly healthcare providers using PHPGurukul Hospital Management System 4.0, this vulnerability poses a risk of unauthorized access to sensitive patient and operational data. Exploitation could result in data breaches violating GDPR regulations, leading to legal penalties and reputational damage. Integrity compromise could affect medical records, potentially impacting patient care quality and safety. Availability impacts, although rated low, could disrupt hospital management workflows, causing operational delays. The requirement for high privileges limits exploitation to insiders or compromised accounts, but insider threats or credential theft could enable attacks. The public disclosure increases the likelihood of targeted attacks, especially in countries with advanced healthcare IT infrastructure. European healthcare entities are prime targets due to the value of medical data and regulatory scrutiny, making timely mitigation essential to avoid compliance violations and patient harm.

1. Immediately restrict access to the /hms/admin/manage-doctors.php functionality to only trusted administrators and monitor access logs for suspicious activity. 2. Implement strict input validation and sanitization for the 'ID' parameter, preferably using parameterized queries or prepared statements to prevent SQL injection. 3. Apply any available vendor patches or updates as soon as they are released; if no patches exist, consider temporary workarounds such as web application firewalls (WAF) with SQL injection detection rules. 4. Conduct a thorough audit of user privileges to ensure only necessary users have high-level access, and enforce strong authentication mechanisms including multi-factor authentication. 5. Monitor network traffic and database logs for anomalous queries or access patterns indicative of exploitation attempts. 6. Educate administrative users about the risks of credential compromise and enforce regular password changes. 7. If feasible, isolate the hospital management system network segment to limit exposure. 8. Prepare incident response plans specifically addressing potential data breaches or integrity violations stemming from this vulnerability.