CVE-2026-95770 in Fabric Composer
Summary
by MITRE • 11/03/2026
A sensitive information disclosure vulnerability in the underlying operating system of HPE Networking Fabric Composer could allow an authenticated low-privileged user with local access to view sensitive information, if certain preconditions outside of the attacker's control are met. Successful exploitation could allow an attacker to obtain sensitive information from the affected system.
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Analysis
by VulDB Data Team • 11/03/2026
The vulnerability identified in Hewlett Packard Enterprise Networking Fabric Composer represents a classic instance of insecure direct object references or improper access controls within the underlying operating system layer. This flaw allows authenticated low-privileged users with local shell access to retrieve sensitive data that should be restricted to higher-level administrative accounts or isolated processes. The existence of this weakness indicates a failure in implementing strict separation of duties and principle of least privilege at the OS level, where file permissions, environment variables, or temporary storage mechanisms are not adequately secured against unauthorized read operations by non-privileged entities.
From a technical perspective, the root cause likely stems from misconfigured file system permissions on critical configuration files, log directories, or memory dumps that contain credentials, network topology details, or cryptographic keys. When an attacker gains local access through legitimate but low-level authentication mechanisms, they can exploit these permission gaps to read data intended for internal processing only. The requirement for certain preconditions outside the attacker's control suggests that specific services must be running in a vulnerable state, or that temporary files have been left with world-readable permissions during routine operations such as logging updates or generating diagnostic reports. This dependency on external factors makes exploitation somewhat situational but still poses a significant risk if those conditions are met.
The operational impact of this information disclosure is substantial for enterprise network environments relying on Fabric Composer for centralized management and automation. Exposure of sensitive system data can lead to the compromise of administrative credentials, revealing internal IP addresses, VLAN configurations, or device serial numbers that aid in further reconnaissance attacks. Attackers could use this intelligence to craft more targeted exploits against other components within the SDN infrastructure, potentially leading to broader network disruption or unauthorized control over network devices. The breach undermines the confidentiality integrity and availability triad by eroding trust in the security boundaries between different privilege levels on the management plane.
This vulnerability aligns with CWE-200 Information Exposure, which covers situations where sensitive information is disclosed due to improper handling of error messages, debug data, or file permissions. It also maps closely to ATT&CK technique T1083 File and Directory Discovery, as the attacker utilizes local access to enumerate and read restricted files. Furthermore, it relates to CWE-732 Incorrect Permission Assignment for Critical Resource, highlighting a fundamental flaw in how the operating system assigns access rights to sensitive artifacts within the Fabric Composer environment.
Mitigation strategies should focus on hardening the underlying operating system configuration rather than relying solely on application-level controls. Administrators must ensure that all files containing sensitive information have restrictive permissions set using standard Unix-like chmod commands or Windows ACLs, ensuring only root or specific service accounts can read them. Regular audits of file permissions and ownership are essential to detect any drift from secure baselines. Additionally, implementing mandatory access control systems such as SELinux or AppArmor can provide an additional layer of enforcement that prevents processes running under low-privileged user contexts from accessing protected resources regardless of traditional permission settings. Keeping the Fabric Composer software updated with vendor-provided patches is critical, as HPE likely addresses these specific permission issues in subsequent releases to close the gap between local authentication and data access rights.