CVE-2026-31896: WeGIA SQL Injection Vulnerability

CVE-2026-31896 Overview

CVE-2026-31896 is a critical SQL Injection vulnerability affecting WeGIA, a web manager application designed for charitable institutions. The vulnerability exists in versions prior to 3.6.6 and allows attackers to execute arbitrary SQL commands through the remover_produto_ocultar.php script. The flaw stems from the unsafe use of extract($_REQUEST) to populate local variables, which are then directly concatenated into SQL queries executed via PDO::query without proper sanitization.

Critical Impact

Unauthenticated or authenticated attackers can exploit this SQL injection to exfiltrate sensitive data from the database, manipulate records, or cause denial of service through time-based attacks.

Affected Products

• WeGIA Web Manager versions prior to 3.6.6

Discovery Timeline

• 2026-03-11 - CVE-2026-31896 published to NVD
• 2026-03-12 - Last updated in NVD database

Technical Details for CVE-2026-31896

Vulnerability Analysis

This SQL Injection vulnerability (CWE-89) represents a severe security flaw in the WeGIA application's data handling architecture. The root issue lies in the dangerous combination of PHP's extract() function with unsanitized user input being passed directly to database queries.

The remover_produto_ocultar.php script employs extract($_REQUEST), which automatically creates PHP variables from all user-supplied request parameters. These dynamically created variables are then concatenated directly into SQL query strings and executed through PDO. While PDO supports prepared statements that would prevent SQL injection, the application bypasses this protection by using PDO::query with raw string concatenation.

An attacker can leverage this vulnerability to perform a range of malicious activities including extracting sensitive donor information, financial records, and user credentials stored in the charitable institution's database. Additionally, as demonstrated in proof-of-concept research, attackers can execute time-based SQL injection payloads to cause denial of service conditions.

Root Cause

The vulnerability originates from two compounding insecure coding practices. First, the use of extract($_REQUEST) creates variables directly from user-controlled input without validation, allowing attackers to inject arbitrary values into the script's variable namespace. Second, these attacker-controlled variables are directly concatenated into SQL queries rather than being passed through parameterized queries or prepared statements.

Attack Vector

The attack is network-accessible and requires no authentication in scenarios where authentication bypass is possible. An attacker crafts malicious HTTP requests containing SQL injection payloads within request parameters. When the remover_produto_ocultar.php script processes these requests, the malicious SQL is extracted into local variables and concatenated directly into the database query, resulting in arbitrary SQL command execution.

The vulnerability can be exploited to extract sensitive database contents through UNION-based injection, manipulate data through INSERT/UPDATE/DELETE injections, or cause service disruption via time-based payloads such as SLEEP() functions in MySQL or pg_sleep() in PostgreSQL.

Detection Methods for CVE-2026-31896

Indicators of Compromise

• Unusual database query patterns containing SQL injection signatures such as UNION SELECT, OR 1=1, or SLEEP() commands
• HTTP request logs showing malformed or suspicious parameters targeting remover_produto_ocultar.php
• Database logs indicating failed or anomalous queries originating from the web application
• Unexpected database response times indicating potential time-based blind SQL injection attempts

Detection Strategies

• Implement web application firewall (WAF) rules to detect and block SQL injection patterns in HTTP requests
• Monitor database query logs for injection signatures and anomalous query structures
• Deploy intrusion detection systems (IDS) with SQL injection detection capabilities
• Review web server access logs for repeated requests to remover_produto_ocultar.php with unusual parameter values

Monitoring Recommendations

• Enable verbose logging on the database server to capture all queries executed by the WeGIA application
• Configure real-time alerting for database errors or query failures that may indicate injection attempts
• Implement application performance monitoring to detect unusual response latencies caused by time-based attacks
• Establish baseline metrics for normal database activity to identify deviations indicative of exploitation

How to Mitigate CVE-2026-31896

Immediate Actions Required

• Upgrade WeGIA to version 3.6.6 or later immediately to address the SQL injection vulnerability
• If immediate patching is not possible, restrict network access to the WeGIA application to trusted IP addresses only
• Review database access logs for evidence of prior exploitation attempts
• Consider placing a web application firewall in front of the WeGIA instance to filter malicious requests

Patch Information

The vulnerability has been addressed in WeGIA version 3.6.6. Organizations should update to this version or later to remediate the SQL injection vulnerability. Detailed patch information is available in the GitHub Security Advisory.

Workarounds

• Deploy a web application firewall (WAF) configured with SQL injection detection rules in front of the WeGIA application
• Implement network-level access controls to limit who can reach the vulnerable endpoint
• Disable or rename the remover_produto_ocultar.php script if the functionality is not critical to operations
• Monitor all database traffic for injection patterns until the official patch can be applied

# Example: Block access to vulnerable endpoint via Apache .htaccess
<Files "remover_produto_ocultar.php">
    Order Deny,Allow
    Deny from all
    # Allow only from trusted admin IPs
    Allow from 192.168.1.0/24
</Files>