CVE-2026-26696: Simple Student Alumni System SQLi Flaw

CVE-2026-26696 Overview

CVE-2026-26696 is a SQL Injection vulnerability affecting code-projects Simple Student Alumni System v1.0. The vulnerability exists in the /TracerStudy/recordteacher_edit.php endpoint, allowing attackers to manipulate database queries through malicious input. SQL Injection flaws of this nature enable unauthorized access to sensitive data, database manipulation, and potentially complete system compromise.

Critical Impact

This SQL Injection vulnerability allows unauthenticated attackers to execute arbitrary SQL commands against the backend database, potentially leading to complete data breach, unauthorized data modification, or deletion of critical student and alumni records.

Affected Products

• Carmelo Simple Student Alumni System v1.0
• code-projects Simple Student Alumni System TracerStudy module
• Systems running /TracerStudy/recordteacher_edit.php endpoint

Discovery Timeline

• 2026-03-02 - CVE-2026-26696 published to NVD
• 2026-03-03 - Last updated in NVD database

Technical Details for CVE-2026-26696

Vulnerability Analysis

The vulnerability is classified under CWE-89 (Improper Neutralization of Special Elements used in an SQL Command), commonly known as SQL Injection. The affected endpoint /TracerStudy/recordteacher_edit.php fails to properly sanitize user-supplied input before incorporating it into SQL queries. This allows attackers to inject malicious SQL statements that are then executed by the database server with the same privileges as the application.

The network-accessible nature of this vulnerability means attackers can exploit it remotely without requiring any authentication or user interaction. The potential impact spans confidentiality, integrity, and availability of the entire database system.

Root Cause

The root cause of this vulnerability is insufficient input validation and the lack of parameterized queries (prepared statements) in the recordteacher_edit.php file. User-controlled input is directly concatenated into SQL query strings rather than being properly sanitized or bound as parameters, creating the injection point. This is a common vulnerability pattern in PHP applications that do not implement secure coding practices for database interactions.

Attack Vector

The attack vector for CVE-2026-26696 is network-based, requiring no authentication or privileges. An attacker can craft malicious HTTP requests containing SQL injection payloads targeting the recordteacher_edit.php endpoint. The injected SQL commands are processed by the database server, allowing the attacker to:

• Extract sensitive student and alumni information
• Modify or delete database records
• Potentially escalate to operating system command execution depending on database configuration
• Bypass authentication mechanisms

The vulnerability can be exploited by sending specially crafted parameters to the vulnerable endpoint. For detailed technical information, refer to the bug report documentation on GitHub.

Detection Methods for CVE-2026-26696

Indicators of Compromise

• Unusual database queries in application logs containing SQL syntax characters such as single quotes, double dashes, or UNION statements
• Unexpected access patterns to the /TracerStudy/recordteacher_edit.php endpoint
• Database error messages appearing in web server logs indicating malformed queries
• Anomalous data access or extraction volumes from the student/alumni database

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block SQL injection patterns in requests to the TracerStudy module
• Monitor HTTP request parameters for common SQL injection signatures including ' OR 1=1, UNION SELECT, and comment sequences
• Enable database query logging and alert on queries with suspicious patterns or syntax errors
• Deploy intrusion detection systems with signatures for SQL injection attack patterns

Monitoring Recommendations

• Configure alerting for repeated failed database queries that may indicate injection attempts
• Monitor access logs for high-frequency requests to recordteacher_edit.php from single IP addresses
• Implement database activity monitoring to detect unauthorized data access patterns
• Review web server error logs for database-related exceptions

How to Mitigate CVE-2026-26696

Immediate Actions Required

• Restrict network access to the /TracerStudy/recordteacher_edit.php endpoint until a patch is applied
• Implement a Web Application Firewall (WAF) with SQL injection protection rules
• Review and audit database permissions to minimize the privileges of the application database user
• Consider temporarily disabling the affected functionality if it is not business-critical

Patch Information

At the time of publication, no official vendor patch has been released for CVE-2026-26696. Organizations using Carmelo Simple Student Alumni System v1.0 should monitor the project repository for updates and apply patches as soon as they become available. In the interim, implement the workarounds and mitigations described below.

Workarounds

• Deploy input validation at the web server or reverse proxy level to filter SQL injection characters
• Modify the vulnerable PHP file to use parameterized queries (PDO prepared statements) instead of string concatenation
• Implement stored procedures for database operations to limit the scope of potential injection attacks
• Apply network-level access controls to restrict access to the TracerStudy module to trusted IP ranges only

# Example: Apache mod_rewrite rule to block common SQL injection patterns
# Add to .htaccess or Apache configuration
RewriteEngine On
RewriteCond %{QUERY_STRING} (union.*select|select.*from|insert.*into|drop.*table|delete.*from) [NC]
RewriteRule ^/TracerStudy/recordteacher_edit\.php - [F,L]