CVE-2026-19231 is a SQL injection vulnerability affecting SourceCodester Simple Doctors Appointment System version 1.0. The flaw exists in the /admin/ajax.php?action=delete_appointment file where the ID parameter is not properly sanitized, enabling attackers to inject arbitrary SQL commands remotely. Public exploit code has been released, but there is no vendor-provided patch or official remediation at this time. The vulnerability has a CVSS 4.0 base score of 6.9, indicating a medium severity level.

Successful exploitation of this vulnerability could allow an attacker to execute arbitrary SQL commands on the backend database, potentially leading to unauthorized data access, modification, or deletion. Since the attack vector is remote and requires no privileges or user interaction, the risk is elevated. However, the overall severity is medium, reflecting some limitations or mitigations inherent in the environment or exploit complexity.

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 on the affected endpoint to mitigate SQL injection risks. Monitor for any vendor updates or security advisories regarding this vulnerability.