CVE-2026-2663 is a SQL injection vulnerability identified in the Alixhan xh-admin-backend product, affecting all versions up to 1.7.0. The vulnerability resides in the database query handler component that processes requests to the endpoint /frontend-api/system-service/api/system/role/query. Specifically, the 'prop' argument is improperly sanitized, allowing an attacker to inject malicious SQL code. This injection flaw can be exploited remotely without requiring authentication or user interaction, increasing the attack surface. The vulnerability has a CVSS 4.0 base score of 5.3, indicating medium severity, with an attack vector of network and low attack complexity. The impact includes potential unauthorized disclosure, modification, or deletion of database contents, which could compromise confidentiality, integrity, and availability of the affected systems. The vendor was notified but has not issued a patch or response, and no known exploits have been observed in the wild yet. Given the public disclosure, threat actors may develop exploits, increasing risk over time. The lack of authentication requirements and the remote attack vector make this vulnerability particularly concerning for exposed deployments. The vulnerability's scope is limited to the xh-admin-backend product, but organizations using this software should consider it a priority for remediation.

For European organizations, exploitation of CVE-2026-2663 could lead to unauthorized access to sensitive data managed by the xh-admin-backend system, including potentially critical role and permission configurations. This could result in data breaches, privilege escalation, or disruption of administrative functions. The integrity of backend databases could be compromised, affecting business operations and compliance with data protection regulations such as GDPR. The availability of administrative services might also be impacted if attackers execute destructive SQL commands. Organizations in sectors with high regulatory scrutiny or handling sensitive personal or financial data are particularly at risk. The medium severity score suggests moderate but tangible risk, especially if the backend is exposed to untrusted networks. The lack of vendor response and patch availability increases the urgency for organizations to implement compensating controls. Additionally, the public disclosure may attract attackers targeting European entities that rely on this product, especially where the backend interfaces with critical infrastructure or sensitive applications.

1. Immediately restrict network access to the /frontend-api/system-service/api/system/role/query endpoint to trusted internal IPs or VPN users only. 2. Implement strict input validation and sanitization on the 'prop' parameter at the application level to block SQL injection payloads. 3. Employ Web Application Firewalls (WAFs) with custom rules to detect and block SQL injection attempts targeting this endpoint. 4. Review and minimize database user privileges used by the xh-admin-backend to limit the impact of any injection attack. 5. Monitor logs for unusual or suspicious queries to the affected API endpoint to detect potential exploitation attempts. 6. If possible, isolate the xh-admin-backend service in a segmented network zone to reduce exposure. 7. Engage with the vendor or community for updates or unofficial patches and consider alternative solutions if no patch is forthcoming. 8. Conduct security assessments and penetration testing focused on this vulnerability to validate defenses. 9. Educate relevant IT and security staff about this vulnerability and the importance of monitoring and rapid response. 10. Plan for incident response scenarios involving SQL injection attacks on this component.