CVE-2026-16490: Hospital Management System SQL Injection

CVE-2026-16490 Overview

CVE-2026-16490 is a SQL injection vulnerability in itsourcecode Hospital Management System 1.0. The flaw resides in the /prescription.php script, where the editid parameter is passed to a database query without proper sanitization. Attackers can manipulate this argument to inject arbitrary SQL statements against the backend database.

The vulnerability is remotely exploitable and requires low-level authenticated access. Public exploit details have been released, increasing the likelihood of opportunistic attacks against exposed installations. The issue is categorized under [CWE-74] (Improper Neutralization of Special Elements in Output Used by a Downstream Component).

Critical Impact
Remote attackers with low privileges can inject SQL statements through /prescription.php to read, modify, or delete patient records stored in the Hospital Management System database.

Affected Products

itsourcecode Hospital Management System 1.0
Component: /prescription.php
Vulnerable parameter: editid

Discovery Timeline

2026-07-22 - CVE-2026-16490 published to NVD
2026-07-22 - Last updated in NVD database

Technical Details for CVE-2026-16490

Vulnerability Analysis

The vulnerability exists in the /prescription.php endpoint of itsourcecode Hospital Management System 1.0. User-controlled input supplied via the editid HTTP parameter flows directly into a SQL query without parameterization or input sanitization.

Because the query concatenates the attacker-controlled string into the SQL statement, an attacker can break out of the intended query context. This allows injection of additional SQL clauses, subqueries, or UNION-based payloads. The attack requires network access and a low-privileged account, but no user interaction.

Exploitation impacts the confidentiality, integrity, and availability of hospital data, including patient records, prescriptions, and administrative information. The EPSS score is 0.2%, reflecting a low but non-zero probability of exploitation attempts within the near term.

Root Cause

The root cause is improper neutralization of special elements in a downstream SQL query [CWE-74]. The editid parameter is embedded directly into a database query string, bypassing prepared statements or input validation. Any single quote, comment sequence, or SQL keyword supplied by the attacker is executed as part of the query.

Attack Vector

An attacker sends a crafted HTTP request to /prescription.php with a malicious editid value. Typical payloads use boolean-based, time-based, or UNION-based injection techniques to extract data or manipulate records. Because the exploit is public, automated scanners and off-the-shelf tools such as sqlmap can weaponize the flaw with minimal effort.

No verified exploit code is available in structured form. See the VulDB Vulnerability Report and the GitHub Issue Tracker for technical details on the disclosed payload.

Detection Methods for CVE-2026-16490

Indicators of Compromise

HTTP requests to /prescription.php containing SQL metacharacters in the editid parameter, such as single quotes, UNION SELECT, SLEEP(, or -- comment sequences.
Web server access logs showing repeated requests to /prescription.php from a single source with varying editid values indicative of automated fuzzing.
Unexpected database errors or elevated query latency correlated with requests to the prescription endpoint.

Detection Strategies

Deploy web application firewall (WAF) rules that inspect the editid parameter for SQL injection signatures on requests to /prescription.php.
Enable database query logging and alert on syntax errors, malformed queries, or queries returning abnormally large result sets from the Hospital Management System application user.
Correlate authentication events with subsequent request patterns to identify low-privileged accounts probing the prescription module.

Monitoring Recommendations

Baseline normal request patterns to /prescription.php and alert on deviations in parameter length, character composition, or request frequency.
Monitor outbound database connections for unusual data volumes that may indicate mass extraction of patient records.
Review application logs for repeated 500-series HTTP responses tied to the prescription endpoint.

How to Mitigate CVE-2026-16490

Immediate Actions Required

Restrict network access to the Hospital Management System so that only trusted internal users can reach /prescription.php.
Audit accounts with access to the application and revoke unnecessary low-privileged credentials that could be used to trigger the flaw.
Deploy WAF signatures blocking SQL injection payloads targeting the editid parameter until a code-level fix is applied.

Patch Information

No official vendor patch has been published at the time of NVD entry. Refer to the IT Source Code Blog and the VulDB CVE-2026-16490 advisory for updates. Organizations running Hospital Management System 1.0 should apply source-level fixes by converting affected queries to prepared statements with parameter binding.

Workarounds

Modify /prescription.php to use parameterized queries or an ORM that enforces prepared statements for the editid value.
Add server-side input validation to reject any editid value that is not a strictly numeric identifier.
Apply least-privilege principles to the database account used by the application, removing DDL and cross-database privileges.

bash

# Example input validation snippet for editid (PHP)
$editid = filter_input(INPUT_GET, 'editid', FILTER_VALIDATE_INT);
if ($editid === false || $editid === null) {
    http_response_code(400);
    exit('Invalid request');
}

$stmt = $mysqli->prepare('SELECT * FROM prescriptions WHERE id = ?');
$stmt->bind_param('i', $editid);
$stmt->execute();