CVE-2026-5575: Record Management System SQL Vulnerability

CVE-2026-5575 Overview

A SQL injection vulnerability has been identified in SourceCodester/jkev Record Management System version 1.0. This vulnerability affects the login functionality within the index.php file, where improper handling of the Username argument allows attackers to inject malicious SQL code. The attack can be executed remotely without authentication, and a public exploit is now available.

Critical Impact

Remote attackers can exploit this SQL injection vulnerability to bypass authentication, extract sensitive database information, or potentially modify database contents through the login form's Username field.

Affected Products

• SourceCodester/jkev Record Management System 1.0
• Login component (index.php)

Discovery Timeline

• April 5, 2026 - CVE-2026-5575 published to NVD
• April 7, 2026 - Last updated in NVD database

Technical Details for CVE-2026-5575

Vulnerability Analysis

This SQL injection vulnerability (CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component) exists in the login functionality of the Record Management System. The application fails to properly sanitize user-supplied input in the Username field before incorporating it into SQL queries. This lack of input validation allows attackers to manipulate the database query structure by injecting SQL syntax through the authentication form.

The vulnerability is accessible over the network without requiring any prior authentication or user interaction, making it particularly dangerous for internet-facing deployments. Successful exploitation could enable an attacker to bypass authentication mechanisms, enumerate database contents, extract sensitive information such as user credentials, or potentially execute administrative operations on the underlying database.

Root Cause

The root cause stems from the application's failure to implement parameterized queries or prepared statements when processing the Username input in the index.php login component. Instead, user input appears to be directly concatenated into SQL query strings without proper sanitization or escaping, creating a classic SQL injection attack surface. This represents a fundamental secure coding violation that allows user-controlled data to alter the intended logic of database queries.

Attack Vector

The attack is network-based and can be launched remotely against the login page. An attacker can craft malicious payloads containing SQL syntax in the Username field to manipulate the backend query. Common attack techniques include using single quotes to break out of string literals, boolean-based blind injection to extract data character by character, UNION-based injection to retrieve data from other tables, or time-based blind injection to infer information through response delays. The public availability of exploit code increases the risk of opportunistic attacks against vulnerable installations.

Technical documentation for this vulnerability is available through the GitHub CVE Documentation and VulDB Vulnerability #355345.

Detection Methods for CVE-2026-5575

Indicators of Compromise

• Unusual SQL syntax patterns in web server access logs targeting the index.php login endpoint
• Authentication success events from unexpected IP addresses or following anomalous request patterns
• Database query logs showing malformed or suspicious SELECT/UNION statements originating from the login function
• Unexpected database enumeration or data extraction activity

Detection Strategies

• Deploy web application firewall (WAF) rules to detect and block SQL injection patterns in POST parameters to the login page
• Enable detailed logging on the web server and database to capture query execution and authentication events
• Implement intrusion detection system (IDS) signatures for common SQL injection payloads including single quotes, UNION SELECT, and OR 1=1 patterns
• Monitor for anomalous authentication patterns such as multiple failed logins followed by success from the same source

Monitoring Recommendations

• Review access logs for requests to index.php containing SQL metacharacters in the Username parameter
• Configure database auditing to alert on queries with suspicious patterns or unexpected administrative operations
• Set up alerting for high volumes of authentication attempts or unusual login success patterns

How to Mitigate CVE-2026-5575

Immediate Actions Required

• Restrict network access to the Record Management System login page to trusted IP ranges only
• Deploy a web application firewall with SQL injection detection rules in front of the vulnerable application
• Consider taking the application offline if it processes sensitive data until remediation is complete
• Review application logs for evidence of prior exploitation attempts

Patch Information

No official vendor patch information is currently available for this vulnerability. Organizations should monitor the VulDB Submission #783472 and vendor channels for updates. Given the public availability of the exploit, prioritize implementing compensating controls immediately.

Workarounds

• Implement input validation to reject SQL metacharacters in the Username field at the application or WAF level
• If source code access is available, modify the login query to use parameterized queries or prepared statements
• Deploy network segmentation to limit database access from the web application server
• Implement IP-based access controls to restrict login page access to authorized networks

# Example WAF rule to block SQL injection in Username parameter
# For ModSecurity-compatible firewalls
SecRule ARGS:Username "@rx (?i)(\b(union|select|insert|update|delete|drop|alter|exec|execute)\b|'|--|;)" \
    "id:100001,phase:2,deny,status:403,msg:'SQL Injection attempt blocked in Username field'"