CVE-2026-5563: AutohomeCorp Frostmourne SQLi Vulnerability

CVE-2026-5563 Overview

A SQL Injection vulnerability has been discovered in AutohomeCorp frostmourne up to version 1.0. The vulnerability affects the httpTest function within the file /api/monitor-api/alarm/previewData of the Alarm Preview component. The manipulation of input parameters results in SQL injection, allowing attackers to execute arbitrary SQL commands against the underlying database. This attack can be launched remotely by authenticated users, and exploit code has been publicly released.

Critical Impact

Remote attackers with low privileges can exploit this SQL injection vulnerability to read, modify, or delete database contents, potentially compromising data integrity and confidentiality across the monitoring system.

Affected Products

• AutohomeCorp frostmourne version 1.0 and earlier
• Alarm Preview component (/api/monitor-api/alarm/previewData endpoint)
• Systems utilizing the httpTest function for alarm data preview

Discovery Timeline

• 2026-04-05 - CVE-2026-5563 published to NVD
• 2026-04-07 - Last updated in NVD database

Technical Details for CVE-2026-5563

Vulnerability Analysis

This vulnerability is classified under CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component), commonly referred to as injection. The flaw exists in the Alarm Preview functionality of frostmourne, a monitoring and alerting platform. When processing requests to the /api/monitor-api/alarm/previewData endpoint, the httpTest function fails to properly sanitize user-supplied input before incorporating it into SQL queries.

The network-accessible nature of this vulnerability means that any authenticated user with access to the alarm preview feature can potentially exploit this flaw. While the attack complexity is low, it does require valid credentials to access the affected endpoint.

Root Cause

The root cause of this vulnerability stems from insufficient input validation and lack of parameterized queries in the httpTest function. When the Alarm Preview component processes user input for data preview operations, it directly concatenates user-controlled values into SQL query strings without proper sanitization or the use of prepared statements. This allows specially crafted input containing SQL metacharacters to break out of the intended query context and execute arbitrary SQL commands.

Attack Vector

The attack is conducted remotely over the network against the /api/monitor-api/alarm/previewData API endpoint. An attacker with low-level privileges can manipulate request parameters sent to the httpTest function. By injecting malicious SQL syntax into these parameters, the attacker can modify the query logic to extract sensitive data, bypass authentication checks within database queries, modify or delete records, or potentially execute stored procedures depending on the database configuration and permissions.

The vulnerability has been publicly disclosed with exploit information available through VulDB, increasing the likelihood of exploitation in the wild. Additional technical details can be found in the Feishu Document referenced in the vulnerability disclosure.

Detection Methods for CVE-2026-5563

Indicators of Compromise

• Unusual or malformed requests to /api/monitor-api/alarm/previewData containing SQL syntax characters such as single quotes, semicolons, or UNION statements
• Database error messages appearing in application logs or responses that reveal SQL query structure
• Unexpected database queries or execution of stored procedures from the frostmourne application context
• Anomalous data access patterns or bulk data retrieval from the monitoring database

Detection Strategies

• Implement web application firewall (WAF) rules to detect and block common SQL injection patterns targeting the affected endpoint
• Configure database activity monitoring to alert on suspicious queries originating from the frostmourne application
• Deploy intrusion detection signatures for SQL injection attempts against /api/monitor-api/alarm/previewData
• Review application logs for request patterns containing SQL keywords (SELECT, UNION, INSERT, DELETE, DROP) in unexpected parameters

Monitoring Recommendations

• Enable detailed logging for all requests to the Alarm Preview API endpoint
• Monitor database query logs for anomalous queries executed by the frostmourne application user
• Set up alerts for authentication failures followed by successful access to the alarm preview functionality
• Implement rate limiting on the affected endpoint to slow potential automated exploitation attempts

How to Mitigate CVE-2026-5563

Immediate Actions Required

• Restrict network access to the /api/monitor-api/alarm/previewData endpoint to trusted IP addresses only
• Implement additional authentication controls or temporarily disable the Alarm Preview feature if not business-critical
• Deploy WAF rules to filter SQL injection patterns on incoming requests
• Review database user permissions for the frostmourne application and apply the principle of least privilege

Patch Information

As of the last NVD update on 2026-04-07, no official patch information has been published by AutohomeCorp. Monitor the VulDB entry and the official frostmourne repository for security updates. Organizations should prioritize upgrading to patched versions once they become available.

Workarounds

• Implement input validation at the application gateway level to reject requests containing SQL metacharacters
• Use a reverse proxy or WAF to sanitize and validate all parameters before they reach the vulnerable endpoint
• Consider implementing prepared statements or parameterized queries as a code-level fix if modifying the source is possible
• Isolate the frostmourne deployment on a segmented network with restricted access

# Example: Block SQL injection patterns using nginx location rules
location /api/monitor-api/alarm/previewData {
    # Deny requests containing common SQL injection patterns
    if ($args ~* "(union|select|insert|delete|drop|update|;|'|\")" ) {
        return 403;
    }
    # Additional authentication requirement
    auth_basic "Restricted Access";
    auth_basic_user_file /etc/nginx/.htpasswd;
    proxy_pass http://frostmourne-backend;
}