CVE-2026-95745 in Fabric Composer
Summary
by MITRE • 11/03/2026
A vulnerability in the API of HPE Networking Fabric Composer could allow an unauthenticated remote attacker to conduct a denial of service attack. Successful exploitation could allow an attacker to cause the management services to become unavailable.
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Analysis
by VulDB Data Team • 11/03/2026
The identified vulnerability resides within the application programming interface (API) component of Hewlett Packard Enterprise Networking Fabric Composer, presenting a critical risk to network infrastructure stability. This flaw specifically enables unauthenticated remote attackers to execute denial of service attacks against the target system. The absence of authentication requirements for this specific API endpoint significantly lowers the barrier to entry for malicious actors, allowing anyone with network connectivity to attempt exploitation without needing valid credentials or prior access privileges.
The technical nature of this vulnerability involves a failure in input validation and resource management within the Fabric Composer's service layer. When an attacker sends specifically crafted requests to the vulnerable API endpoints, it triggers excessive processing loads or memory exhaustion conditions that the system cannot handle gracefully. This leads to a state where the management services responsible for orchestrating network fabric operations become unresponsive or crash entirely. The root cause typically stems from improper handling of malformed data structures or resource-intensive commands that bypass expected rate limiting and validation checks, causing the underlying service threads to hang or terminate unexpectedly.
The operational impact of this vulnerability is severe due to the central role Fabric Composer plays in managing software-defined networking environments. By rendering management services unavailable, an attacker effectively blinds administrators to the state of their network infrastructure. This loss of visibility prevents routine monitoring, configuration changes, and troubleshooting activities essential for maintaining network integrity. In a production environment, such unavailability can lead to extended downtime, hindered incident response capabilities, and potential cascading failures if automated failover mechanisms rely on these management services for status checks or reconfiguration tasks.
From a classification perspective, this vulnerability aligns with CWE-20 Improper Input Validation and CWE-400 Resource Exhaustion within the Common Weakness Enumeration framework. In terms of tactical behavior, it corresponds to ATT&CK technique T1499 Endpoint Denial of Service, where adversaries aim to disrupt or deny service to specific components rather than stealing data. The unauthenticated nature of the attack also reflects CWE-306 Missing Authentication for Critical Function, highlighting a fundamental security design flaw in how API endpoints are secured and exposed to network traffic.
To mitigate this risk, immediate remediation should focus on applying vendor-provided patches that address the input validation logic within the Fabric Composer API. In environments where patching is not immediately feasible, implementing strict access control lists at the network perimeter or firewall level can restrict source IP addresses allowed to communicate with the vulnerable API endpoints. Additionally, deploying web application firewalls configured to detect and block anomalous request patterns associated with resource exhaustion attacks can provide a layer of defense against exploitation attempts until permanent fixes are deployed.