CVE-2026-9680 in Cloud RDS OpenAPI MCP Server
Summary
by MITRE • 07/28/2026
Improper exposure of the MCP server in alibabacloud-rds-openapi-mcp-server allows remote attackers to invoke exposed MCP tools via network access to an MCP endpoint listening on all network interfaces by default.
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Analysis
by VulDB Data Team • 07/28/2026
The vulnerability described represents a critical security flaw in Alibaba Cloud's RDS OpenAPI MCP server implementation where the management control plane server fails to properly restrict network access to its exposed endpoints. This misconfiguration allows remote attackers to directly invoke MCP tools through network connections to the MCP endpoint that listens on all network interfaces by default, creating an unauthorized attack surface that violates fundamental security principles of network segmentation and access control.
This technical flaw constitutes a classic case of insufficient network boundary protection and improper privilege management, where the default configuration fails to bind the MCP server to specific trusted interfaces or implement proper authentication mechanisms. The vulnerability directly maps to CWE-284 Access Control Issues, specifically related to inadequate access controls for network services that should be restricted to authorized internal systems only. The exposed MCP tools represent privileged operational functions that could enable attackers to perform administrative actions on the database infrastructure without proper authorization.
The operational impact of this vulnerability is severe and multifaceted, as it provides attackers with direct access to management control plane functionalities that typically require administrative privileges. Remote exploitation could allow threat actors to manipulate database configurations, access sensitive data through administrative interfaces, perform unauthorized operations on database resources, and potentially escalate their privileges within the cloud infrastructure. This vulnerability aligns with ATT&CK technique T1078 Valid Accounts, as it provides unauthorized access to administrative capabilities without requiring legitimate credentials.
The default exposure of MCP endpoints listening on all network interfaces creates an inherent risk that violates security best practices established in frameworks such as NIST SP 800-53 and CIS Controls. Organizations relying on Alibaba Cloud services would be vulnerable to attacks targeting this misconfigured service, potentially leading to data breaches, service disruption, and compliance violations. The vulnerability demonstrates a failure in the principle of least privilege where administrative services should only be accessible from trusted networks or through secure authentication mechanisms.
Mitigation strategies should include immediate configuration changes to restrict MCP server access to specific IP ranges or virtual private clouds, implementation of network segmentation to isolate management interfaces from public internet access, and deployment of proper authentication and authorization controls for all exposed endpoints. Organizations must also conduct comprehensive security assessments of their cloud infrastructure configurations and implement monitoring solutions to detect unauthorized access attempts to management interfaces. Regular security audits should verify that administrative services are properly secured according to industry standards and regulatory requirements.