CVE-2026-33614: Unauthenticated SQL Injection Vulnerability

CVE-2026-33614 Overview

CVE-2026-33614 is an unauthenticated SQL Injection vulnerability affecting the getinfo endpoint. The flaw arises from improper neutralization of special elements used in SQL SELECT commands (CWE-89). An unauthenticated remote attacker can exploit this vulnerability to extract sensitive data from the backend database, resulting in a total loss of confidentiality.

Critical Impact

Unauthenticated attackers can remotely exploit this SQL Injection vulnerability to access and exfiltrate all data from the affected database without requiring any credentials or user interaction.

Affected Products

• Products associated with VDE-2026-030 advisory (refer to CERT@VDE advisory for complete list)

Discovery Timeline

• April 2, 2026 - CVE-2026-33614 published to NVD
• April 2, 2026 - Last updated in NVD database

Technical Details for CVE-2026-33614

Vulnerability Analysis

This SQL Injection vulnerability exists in the getinfo endpoint due to insufficient input validation and improper neutralization of user-supplied data before it is incorporated into SQL queries. The vulnerability is classified under CWE-89 (Improper Neutralization of Special Elements used in an SQL Command).

The attack can be executed remotely over the network with low complexity and requires no privileges or user interaction. However, the impact is limited to confidentiality—attackers can read sensitive database contents but cannot modify data or disrupt service availability.

Root Cause

The root cause is inadequate input sanitization in the getinfo endpoint. User-controlled input is directly concatenated into SQL SELECT statements without proper parameterization or escaping. This allows attackers to inject malicious SQL syntax that alters the intended query logic, enabling unauthorized data retrieval.

Attack Vector

The vulnerability is exploitable via network-based attacks targeting the getinfo endpoint. Since no authentication is required, any attacker with network access to the vulnerable service can craft malicious requests containing SQL injection payloads. The low attack complexity means standard SQL injection techniques can successfully exploit this flaw.

The attack flow typically involves:

1. Attacker identifies the vulnerable getinfo endpoint
2. Malicious SQL syntax is injected through user-controllable parameters
3. The backend database executes the attacker-modified query
4. Sensitive data is returned to the attacker in the response

For detailed technical information, refer to the CERT@VDE Advisory VDE-2026-030.

Detection Methods for CVE-2026-33614

Indicators of Compromise

• Unusual or malformed requests to the getinfo endpoint containing SQL syntax characters such as single quotes, double dashes, or UNION keywords
• Database query logs showing unexpected SELECT statements or query errors
• High volume of requests to the getinfo endpoint from single IP addresses
• Error messages in application logs indicating SQL syntax errors or unexpected query results

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block SQL injection patterns in requests to the getinfo endpoint
• Enable database query logging and monitor for anomalous SELECT statements or queries accessing sensitive tables
• Deploy Intrusion Detection Systems (IDS) with SQL injection signature detection capabilities
• Configure application-level logging to capture all requests to the vulnerable endpoint for forensic analysis

Monitoring Recommendations

• Monitor network traffic for patterns consistent with SQL injection exploitation attempts
• Set up alerts for unusual database access patterns or queries returning large result sets
• Implement rate limiting on the getinfo endpoint to detect potential automated exploitation
• Review application and database logs regularly for signs of data exfiltration

How to Mitigate CVE-2026-33614

Immediate Actions Required

• Apply vendor-provided security patches as soon as they become available
• Restrict network access to the vulnerable getinfo endpoint using firewall rules
• Implement input validation and parameterized queries if source code modification is possible
• Enable WAF rules to block SQL injection attempts targeting the affected endpoint
• Monitor systems for signs of exploitation while awaiting a patch

Patch Information

Refer to the CERT@VDE Advisory VDE-2026-030 for official patch information and remediation guidance from the vendor. The CSAF document provides machine-readable security advisory details.

Workarounds

• Implement network segmentation to limit access to the vulnerable service from untrusted networks
• Deploy a Web Application Firewall with SQL injection protection rules in front of the affected endpoint
• Disable or restrict access to the getinfo endpoint if it is not business-critical
• Implement IP allowlisting to restrict endpoint access to trusted sources only

# Example: iptables rule to restrict access to the vulnerable service
# Replace <SERVICE_PORT> with the actual port number
iptables -A INPUT -p tcp --dport <SERVICE_PORT> -s <TRUSTED_IP_RANGE> -j ACCEPT
iptables -A INPUT -p tcp --dport <SERVICE_PORT> -j DROP