CVE-2026-95767 in Fabric Composer
Summary
by MITRE • 11/03/2026
An unauthenticated information disclosure vulnerability exists in the API of HPE Networking Fabric Composer. Successful exploitation could allow an unauthenticated remote attacker to obtain sensitive information about the affected system.
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Analysis
by VulDB Data Team • 11/03/2026
The identified security flaw resides within the application programming interface of Hewlett Packard Enterprise Networking Fabric Composer, a centralized management platform used for automating and managing data center network infrastructure. This vulnerability is classified as an unauthenticated information disclosure issue, which fundamentally indicates that the software fails to enforce proper access control mechanisms on specific API endpoints or response payloads. Consequently, any remote actor with network connectivity to the service can interact with these interfaces without providing valid credentials, bypassing standard authentication protocols entirely. The existence of such a flaw suggests a misconfiguration in the web server's routing logic or an oversight in the application layer security design where sensitive data structures are exposed via HTTP responses that should be restricted to authorized administrative users only.
From a technical perspective, this vulnerability typically manifests when API endpoints return detailed system metadata, configuration snippets, internal IP addresses, software version strings, or other operational details without verifying the identity of the requesting client. In many enterprise environments, Fabric Composer serves as a critical control plane for network automation, meaning that exposure of its internal state can reveal significant architectural insights to potential adversaries. The attacker does not need to exploit complex logic errors or buffer overflows; rather, they simply issue standard HTTP requests to discoverable endpoints and parse the returned JSON or XML data structures. This type of vulnerability is often categorized under CWE-200: Information Exposure, as it allows an observer to gain information that could be useful for further attacks but does not directly compromise confidentiality through decryption or bypassing encryption in transit if TLS is properly configured. However, even with encrypted channels, the content itself remains sensitive and improperly protected at the application layer.
The operational impact of this vulnerability extends beyond simple data leakage. By obtaining detailed system information, an unauthenticated attacker can perform sophisticated reconnaissance to map the network topology, identify specific hardware models and firmware versions running on managed switches, and understand the automation workflows configured within the Fabric Composer instance. This intelligence is highly valuable for crafting targeted attacks against known vulnerabilities in those specific switch models or orchestrators. Furthermore, knowledge of internal IP addresses and service ports can facilitate lateral movement if the attacker gains initial access to another part of the network. In a worst-case scenario, this information disclosure could aid in social engineering campaigns by revealing organizational structure or technical dependencies that are not publicly available. The lack of authentication requirement makes exploitation trivial and scalable, allowing for automated scanning tools to harvest this data from thousands of potentially vulnerable systems across the internet with minimal effort.
To mitigate this risk, immediate remediation should focus on enforcing strict access controls on all API endpoints within the Fabric Composer application. Administrators must ensure that every request requiring sensitive information is validated against a robust authentication and authorization framework before any response is generated. This involves implementing role-based access control to restrict data visibility based on user privileges and ensuring that unauthenticated users are denied access to internal system details. Additionally, security headers should be configured to prevent caching of sensitive responses in intermediate proxies or browsers. It is also recommended to review the API documentation for public-facing endpoints and disable any unnecessary information exposure features such as verbose error messages or debug modes in production environments. Regular penetration testing focused on authentication bypasses and access control flaws can help identify similar misconfigurations before they are exploited by malicious actors. Keeping the Fabric Composer software updated to the latest version provided by Hewlett Packard Enterprise is critical, as vendors frequently release patches that address these types of logic errors and strengthen API security postures in alignment with industry best practices like MITRE ATT&CK technique T1087: Account Discovery, which describes how attackers enumerate accounts from local systems or remote databases to facilitate further intrusion.