Description

Denial-of-service vulnerabilities exist in the API of HPE Networking Fabric Composer that could allow an authenticated low privilege operator user to cause a denial of service. Successful exploitation could allow an attacker to interrupt the normal operation of the affected service.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "6.5",
  "pubDate": "2026-09-01T20:17:20.380Z",
  "pubdate": "2026-09-01T20:17:20.380Z",
  "executiveSummary": "A denial-of-service (DoS) vulnerability has been identified within the API of HPE Networking Fabric Composer.\nThis flaw allows an authenticated user with low-privilege operator access to disrupt the availability and normal operational status of the service.\nThe vulnerability pertains to an improper handling of requests or resources within the API layer, which can be leveraged to trigger a service interruption.\nThe primary risk is the loss of management capability for the affected networking fabric, potentially impacting automated infrastructure orchestration and monitoring tasks.\nExploitation requires the attacker to possess valid authentication credentials with at least operator-level permissions.\nSuccessful execution of the exploit does not require administrative privileges, significantly expanding the potential threat surface to include accounts with restricted access rights.\nOrganizations relying on HPE Networking Fabric Composer must treat this vulnerability as a significant risk to service continuity and availability.",
  "technicalDetails": "The vulnerability resides within the application programming interface (API) layer of the HPE Networking Fabric Composer platform. The root cause stems from insufficient validation or resource management logic when processing specific requests originating from authenticated sessions with low-privilege (operator) authorization levels.\nIn a standard deployment, the API is responsible for orchestrating network configuration, telemetry data ingestion, and policy enforcement across the fabric. The vulnerability allows an authenticated operator to submit a specially crafted or high-frequency series of requests that overwhelm the service's request handling mechanism or trigger an unhandled exception.\nThe attack flow commences with the adversary establishing an authenticated session using legitimate, low-privilege operator credentials. Once authenticated, the attacker interacts with specific API endpoints that lack robust input sanitization or rate limiting on resource-intensive functions. By invoking these functions in a manner that exceeds the service's capacity to process them concurrently, the attacker forces the service into an unstable state.\nBecause the vulnerability exists in the API layer, the impact is isolated to the service's availability rather than immediate unauthorized data exfiltration or arbitrary code execution. However, the subsequent denial-of-service effectively blinds administrators to fabric status and prevents the deployment of critical configuration changes until the service is manually restored or recovers.\nThe exploitation process typically involves the following steps: 1) The attacker authenticates to the target HPE Networking Fabric Composer instance using valid operator credentials. 2) The attacker identifies specific API calls that initiate resource-heavy background processes or state transitions within the application stack. 3) The attacker submits a payload designed to maximize consumption of the system's memory or CPU cycles, or to induce a deadlock condition within the application's request-processing threads. 4) The service becomes unresponsive, resulting in a denial-of-service condition that impacts legitimate administrative and automated operations.\nThis vulnerability highlights a critical failure in the Principle of Least Privilege and request handling robustness within the API subsystem. The lack of adequate restriction on operator-level actions allows for service-level disruption, necessitating both improved input validation and granular rate-limiting controls on management functions."
}