CVE-2026-73714 in Fabric Composer
Summary
by MITRE • 09/01/2026
A sensitive information disclosure vulnerability exists in the API of HPE Networking Fabric Composer. Successful exploitation could allow an authenticated low privilege operator user to access data beyond what is authorized by the user's existing privilege level, potentially leading to further unauthorized access.
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Analysis
by VulDB Data Team • 09/01/2026
The identified vulnerability represents a critical failure in role-based access control mechanisms within the application programming interface of HPE Networking Fabric Composer. This flaw specifically affects authenticated users who possess low-privilege operator credentials, allowing them to bypass intended security restrictions and retrieve sensitive data that should be inaccessible under their current permission set. The core technical issue stems from an improper authorization check during API request processing, where the system fails to validate whether the requesting user has sufficient privileges for the specific resource or action being requested. This type of flaw is commonly categorized under CWE-269, which denotes Improper Privilege Management, and aligns with ATT&CK technique T1078, Valid Accounts, as it involves an attacker leveraging legitimate but insufficiently restricted credentials to escalate their effective access level within the system.
From a technical perspective, this vulnerability likely arises from a logic error in the backend service that handles API requests for network configuration data or operational status information. Instead of strictly enforcing the permissions associated with the operator role, the application may be relying on client-side controls or failing to re-verify privileges at each endpoint invocation. This oversight enables an authenticated attacker to craft specific HTTP requests targeting administrative endpoints or sensitive database queries that are normally reserved for higher-level administrators. By exploiting this gap in server-side validation, the attacker can extract confidential network topology details, configuration files containing credentials, or other proprietary operational data that is critical to maintaining the integrity and security of the managed infrastructure.
The operational impact of such a vulnerability extends beyond simple data leakage. Accessing unauthorized information provides an adversary with valuable intelligence about the internal structure of the network management system, which can be leveraged for further attacks. For instance, exposure of configuration files might reveal hardcoded passwords or API keys that could be used to compromise other systems within the enterprise environment. Furthermore, understanding the precise capabilities and data structures exposed by this flaw allows an attacker to plan more sophisticated intrusion attempts, potentially leading to complete system takeover if combined with other vulnerabilities. The ability to access sensitive information without elevated privileges undermines the principle of least privilege, a fundamental security concept designed to limit damage in case of a breach or unauthorized access attempt.
To mitigate this risk, immediate action is required to address the underlying authorization logic flaws within the API service. Developers must implement rigorous server-side validation for every API endpoint, ensuring that each request is explicitly checked against the user's assigned role and permissions before processing. This includes verifying not only authentication but also authorization at a granular level, preventing low-privilege users from accessing resources designated for administrators or other higher-tier roles. Additionally, implementing comprehensive logging and monitoring of API access patterns can help detect anomalous behavior indicative of exploitation attempts. Regular security audits and penetration testing focused on role-based access control are essential to identify similar weaknesses in the future. Keeping HPE Networking Fabric Composer updated with the latest vendor patches is also crucial, as manufacturers often release fixes for such vulnerabilities shortly after they are disclosed or discovered through responsible disclosure channels.