CVE-2026-95776 in Fabric Composer
Summary
by MITRE • 11/03/2026
An authenticated path traversal vulnerability exists in the API of HPE Networking Fabric Composer, which could be exploited by an authenticated low-privileged user if certain preconditions outside of the attacker's control are met. Successful exploitation could allow an attacker to read certain files on the underlying operating system.
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Analysis
by VulDB Data Team • 11/03/2026
The identified security flaw resides within the application programming interface of HPE Networking Fabric Composer, a centralized management platform used for orchestrating and managing data center networking infrastructure. This vulnerability is classified as a path traversal issue, specifically designated under CWE-22 in the Common Weakness Enumeration standard. The core technical deficiency involves insufficient validation or sanitization of user-supplied input when processing file system requests within the API endpoints. An attacker who has successfully authenticated to the system with low-privileged credentials can manipulate these inputs by injecting directory traversal sequences, such as dot-dot-slash characters, into request parameters. This manipulation allows the application to resolve paths outside its intended sandbox or working directory, effectively bypassing access controls that are designed to restrict file operations to specific directories.
The exploitation of this vulnerability requires an authenticated session with low-privileged user rights, which significantly narrows the attack surface compared to remote unauthenticated exploits. However, it remains a critical concern because many enterprise environments utilize service accounts or restricted administrative users for automated tasks and monitoring, which may possess sufficient privileges to trigger these API calls but lack broader system access. The preconditions mentioned indicate that successful exploitation depends on factors outside the attacker's direct control, such as the specific configuration of the Fabric Composer instance, the presence of sensitive files in accessible directories, or the existence of other concurrent vulnerabilities that might elevate privileges further. Despite these constraints, the ability to read arbitrary files from the underlying operating system represents a severe compromise of confidentiality.
The operational impact of this vulnerability is substantial, primarily affecting the integrity and security posture of the managed network infrastructure. By reading sensitive configuration files, credential stores, or internal logs, an attacker can gather intelligence necessary for further attacks within the data center environment. This information disclosure facilitates lateral movement, as extracted credentials or topology details can be used to target other systems with higher privilege levels. Furthermore, access to system-level files may reveal security policies, encryption keys, or network segmentation rules that are critical for maintaining a secure perimeter. In the context of the MITRE ATT&CK framework, this behavior aligns with techniques related to Data from Local System and potentially T1083 File and Directory Discovery, as the attacker seeks to enumerate and access sensitive data stored on the host operating system rather than just within the application database.
Mitigation strategies must focus on both immediate remediation and long-term architectural improvements. The primary corrective action is for HPE to release a software update that patches this specific API endpoint by implementing strict input validation, ensuring that all file path requests are canonicalized and checked against an allowlist of permitted directories. Until the patch is applied, administrators should enforce network segmentation policies to restrict access to the Fabric Composer management interface only from trusted IP addresses or jump hosts with multi-factor authentication enabled. Additionally, applying the principle of least privilege ensures that even if low-privileged accounts are compromised, their ability to interact with critical system files remains limited by operating system permissions independent of the application logic. Regular auditing of API logs for anomalous path traversal patterns can also aid in early detection and response efforts.