The vulnerability CVE-2026-36235 involves SQL injection in the scheduleSubList.php component of itsourcecode Online Student Enrollment System v1.0. The 'subjcode' parameter is incorporated into SQL statements via string interpolation without input validation or sanitization, which allows an attacker to inject arbitrary SQL commands. The CVSS v3.1 base score is 9.8 (critical), reflecting network attack vector, low attack complexity, no privileges or user interaction required, and high impact on confidentiality, integrity, and availability. No patch or official remediation has been published, and no known exploits are reported in the wild.

Successful exploitation of this vulnerability could allow an unauthenticated attacker to execute arbitrary SQL commands on the backend database, potentially leading to unauthorized data disclosure, data modification, or deletion, and disruption of service. The critical CVSS score indicates a severe impact on confidentiality, integrity, and availability of the system.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, it is recommended to implement input validation and parameterized queries or prepared statements to prevent SQL injection. Monitor for vendor updates regarding patches or official mitigations.