Description

A vulnerability in the API of HPE Networking Fabric Composer could allow an authenticated low privilege operator user to view some system files. Successful exploitation could allow an attacker to access limited data beyond what is authorized by the user's existing privilege level.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "4.3",
  "pubDate": "2026-09-01T20:17:21.747Z",
  "pubdate": "2026-09-01T20:17:21.747Z",
  "executiveSummary": "A security vulnerability within the HPE Networking Fabric Composer API allows for unauthorized information disclosure via an Insecure Direct Object Reference (IDOR) or improper access control flaw. The vulnerability resides within the API layer, enabling an authenticated user with low-privilege operator status to access system files they are not explicitly authorized to view. The primary impact is the unauthorized exposure of sensitive system data, which could potentially reveal configuration details, environment specifics, or internal structures. This vulnerability represents a failure in the principle of least privilege, as the application fails to adequately validate the user's authorization scope before processing file retrieval requests. The flaw is exploitable by any authenticated operator, requiring no elevated privileges or administrative access, thereby increasing the risk surface within the organization. Successful exploitation does not grant remote code execution or direct system compromise, but the leaked information could be leveraged for reconnaissance or to facilitate further attacks against the infrastructure. HPE Networking Fabric Composer instances are inherently exposed to this risk if the API access control mechanisms are not correctly enforced.",
  "technicalDetails": "The vulnerability is rooted in an improper authorization check within the HPE Networking Fabric Composer API endpoints responsible for file handling and system interaction. When a request is made to these specific API endpoints, the backend service fails to perform adequate validation of the requester's security context or permissions relative to the requested resource path. This indicates a failure in the server-side authorization logic, where the system assumes that the presence of an authenticated session is synonymous with authorization to access all file-related system objects.\nExploitation is achieved by an authenticated operator user who interacts with the API using crafted requests designed to target system-level files. By manipulating parameters or URL paths associated with the API, the attacker can force the application to serve content from the underlying filesystem that should be restricted to administrative or system-level roles. The API acts as a proxy, retrieving and returning the contents of these files in the response payload without verifying if the user has the requisite 'Administrator' or 'Superuser' privilege to access such sensitive information.\nThe attack flow follows a predictable sequence: First, the attacker establishes a valid session with the HPE Networking Fabric Composer platform, authenticating as a low-privilege operator. Second, the attacker performs reconnaissance or utilizes known API request structures to identify endpoints that facilitate file system interaction. Third, the attacker issues a specifically formatted API request—potentially involving directory traversal sequences or direct file path references—designed to bypass the intended access limitations. Fourth, the API processes this request, failing to validate the requestor's authorization level against the target resource, and subsequently retrieves the requested file from the filesystem. Finally, the server transmits the file content back to the attacker's client, resulting in the successful unauthorized disclosure of system data.\nThis vulnerability highlights a critical failure in enforcing Access Control Lists (ACLs) or Role-Based Access Control (RBAC) at the service layer. Because the vulnerability exists within the API, it is accessible over the network interface exposed by the composer. The post-exploitation impact allows a lower-privileged user to gain visibility into configuration files, credentials, or logs, effectively escalating their information-gathering capabilities beyond the constraints imposed by their designated role. The flaw demonstrates that the application logic fails to properly sanitize or authorize user-supplied inputs before interacting with the host operating system's file structures."
}