CVE-2026-95756 in Fabric Composer
Summary
by MITRE • 11/03/2026
A command injection vulnerability exists in the API of HPE Networking Fabric Composer and could be exploited by an authenticated remote attacker with administrative privileges if certain preconditions outside of the attacker's control are met. Successful exploitation could allow an attacker to gain elevated privileges 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 network infrastructure. This vulnerability is classified as a command injection issue, which fundamentally stems from improper neutralization of special elements used in operating system commands. While the initial vector requires an authenticated remote attacker possessing administrative privileges, the severity of the impact is significantly amplified by the potential to escalate beyond application-level access to gain full control over the underlying host operating system. This scenario highlights a critical failure in input validation and sanitization mechanisms within the API endpoints that process user-supplied data for execution on the backend server.
From a technical perspective, command injection vulnerabilities typically occur when an application passes unsafe user supplied data from a form or other request to a system shell. In this specific instance, the administrative interface likely constructs operating system commands dynamically based on inputs provided by the administrator. If these inputs are not rigorously validated against a whitelist of expected characters or if special metacharacters such as semicolons, pipes, or ampersands are not properly escaped, an attacker can inject additional malicious commands into the execution stream. The requirement for administrative privileges suggests that this is likely a privilege escalation vector where a compromised admin account or stolen credentials could be leveraged to execute arbitrary code with high-level system permissions, effectively bypassing application-layer security controls and interacting directly with the OS kernel or services.
The operational impact of successfully exploiting this vulnerability is severe. An attacker who gains elevated privileges on the underlying operating system can perform any action that a local administrator can perform. This includes reading sensitive configuration files, modifying network policies to facilitate lateral movement within the data center, installing persistent backdoors, exfiltrating confidential data, or disrupting critical networking services managed by Fabric Composer. Given that HPE Networking Fabric Composer often serves as the brain of modern software-defined networks, compromising its host system could lead to a widespread outage or security breach across multiple connected network devices and servers, impacting business continuity and data integrity on a large scale.
This vulnerability aligns with Common Weakness Enumeration identifier CWE-78, which describes Improper Neutralization of Special Elements used in an OS Command. Furthermore, the exploitation technique maps directly to MITRE ATT&CK tactic T1059, specifically subtechnique 004 for Unix Shell Commands, and potentially relates to privilege escalation techniques such as T1068 if the attacker leverages this access to further compromise other systems within the environment. The precondition of requiring administrative privileges indicates that while the technical flaw is critical, it relies on an initial breach or credential theft at a high-privilege level, emphasizing the importance of robust identity and access management alongside strict input validation in API design.
To mitigate this risk, immediate remediation should involve applying vendor-provided patches or updates that address the specific command injection flaws within the Fabric Composer API. In addition to patching, organizations must enforce strict input validation on all API endpoints, ensuring that only expected data types and formats are accepted while rejecting any potentially dangerous characters used in shell commands. Implementing principle of least privilege is also crucial; administrative accounts should be restricted from using persistent sessions or shared credentials, and multi-factor authentication should be enforced to reduce the likelihood of credential theft. Network segmentation can further limit the blast radius by isolating management interfaces from general user traffic, ensuring that even if an attacker gains access, their ability to pivot to other critical systems is constrained.