CVE-2026-14694 Overview
CVE-2026-14694 is a SQL injection vulnerability in SourceCodester Multi-Vendor Online Grocery Management System 1.0. The flaw resides in the cancel_order function inside classes/Master.php, which processes the ID POST parameter without proper sanitization. Attackers can manipulate the ID argument to inject arbitrary SQL statements against the backend database. The vulnerability requires network access and low-privilege authentication, and the exploit details have been publicly disclosed. The weakness is classified under [CWE-74] (Improper Neutralization of Special Elements in Output Used by a Downstream Component).
Critical Impact
Authenticated remote attackers can inject SQL statements through the ID POST parameter of the cancel_order handler, potentially exposing or altering order and customer data.
Affected Products
- SourceCodester Multi-Vendor Online Grocery Management System 1.0
- Component: classes/Master.php — cancel_order function
- Attack surface: POST parameter handler processing the ID argument
Discovery Timeline
- 2026-07-05 - CVE-2026-14694 published to NVD
- 2026-07-06 - Last updated in NVD database
Technical Details for CVE-2026-14694
Vulnerability Analysis
The vulnerability exists in the cancel_order function of classes/Master.php, which handles order cancellation requests submitted by authenticated users. The function receives the ID value from a POST request and concatenates it directly into a SQL query without parameterized statements or input validation. This allows an attacker to break out of the intended query context and append arbitrary SQL clauses.
Because the request is processed server-side against the application's MySQL database, successful injection can return, modify, or delete arbitrary rows. Depending on database privileges assigned to the application user, attackers may enumerate schema information, extract order and customer records, or tamper with transactional data. The application does not appear to implement query-level abstraction such as prepared statements for this endpoint.
Root Cause
The root cause is missing input neutralization on the ID parameter before it is used to construct a dynamic SQL statement. Standard defenses such as prepared statements with bound parameters, type casting to integer, or allow-list validation are absent in the cancel_order code path.
Attack Vector
An authenticated remote attacker sends a crafted POST request to the endpoint that invokes cancel_order, supplying a malicious payload in the ID field. The manipulation is delivered over the network and requires no user interaction. Public disclosure of the exploit lowers the barrier to reproduction. See the GitHub Issue on CVE and VulDB CVE-2026-14694 entry for further technical details.
Detection Methods for CVE-2026-14694
Indicators of Compromise
- POST requests to endpoints invoking cancel_order containing SQL meta-characters such as ', --, UNION, or SLEEP( in the ID parameter.
- Unusual database query volume or long-running queries originating from the grocery application's database user.
- Web server access logs showing repeated POST requests to classes/Master.php from a single source with varying ID payload lengths.
Detection Strategies
- Deploy web application firewall rules that inspect POST bodies for SQL injection signatures targeting the ID field of Master.php.
- Enable MySQL general query logging or slow query logging and alert on queries referencing the orders table with syntactically anomalous predicates.
- Correlate authentication events with subsequent order-cancellation traffic to identify low-privilege accounts issuing malformed ID values.
Monitoring Recommendations
- Monitor HTTP 500 responses from classes/Master.php, which often indicate probing for injection points.
- Track outbound data volume from the database host to detect bulk record extraction.
- Alert on new or unexpected database errors written to the PHP error log, particularly syntax errors involving the orders table.
How to Mitigate CVE-2026-14694
Immediate Actions Required
- Restrict access to the Multi-Vendor Online Grocery Management System to trusted networks until a patch is available.
- Audit application accounts and revoke unused low-privilege accounts that could be used to reach the cancel_order endpoint.
- Apply a temporary WAF rule that blocks non-numeric values in the ID POST parameter.
Patch Information
No official vendor patch is referenced in the CVE record at the time of publication. Administrators should monitor the SourceCodester project site and the VulDB vulnerability entry for updated remediation guidance.
Workarounds
- Modify the cancel_order function in classes/Master.php to cast the ID parameter to an integer before use, for example using intval($_POST['ID']).
- Refactor the query to use PDO or MySQLi prepared statements with bound parameters instead of string concatenation.
- Reduce the database user's privileges to the minimum required for order operations, denying DROP, ALTER, and cross-schema SELECT.
# Example WAF-style block rule for the vulnerable parameter (illustrative)
SecRule ARGS:ID "!@rx ^[0-9]+$" \
"id:1026694,phase:2,deny,status:400,\
msg:'Non-numeric ID parameter blocked for cancel_order (CVE-2026-14694)'"
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
