CVE-2026-95766 in Fabric Composer
Summary
by MITRE • 11/03/2026
Sensitive information disclosure vulnerabilities in HPE Networking Fabric Composer could allow an authenticated attacker with low privileges to access sensitive information. Successful exploitation could allow an attacker to disclose sensitive information.
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Analysis
by VulDB Data Team • 11/03/2026
The vulnerability identified within Hewlett Packard Enterprise (HPE) Networking Fabric Composer represents a critical failure in access control mechanisms, specifically categorized under the Common Weakness Enumeration as CWE-200: Exposure of Sensitive Information to an Unauthorized Actor. This flaw allows individuals with authenticated but low-level privileges to retrieve data that should be restricted to higher-tier administrators or system processes. In enterprise network environments, Fabric Composer serves as a central management plane for virtualized infrastructure, making the integrity and confidentiality of its internal state paramount. The existence of this vulnerability indicates a breakdown in the principle of least privilege, where the application fails to properly validate whether the requesting user has sufficient rights to access specific endpoints or data structures before returning them.
From a technical perspective, such vulnerabilities often stem from improper authorization checks on API endpoints or management interfaces. While authentication verifies who the user is, authorization determines what that user is allowed to do. In this scenario, the application likely relies on client-side controls or insufficient server-side validation when processing requests for sensitive configuration data, logs, or credential stores. An attacker leveraging low-privilege credentials can exploit these gaps by crafting specific HTTP requests or manipulating API parameters to bypass intended restrictions. This type of flaw is frequently associated with broken object level authorization (BOLA) patterns found in modern web applications and APIs, where the system trusts user input regarding resource identifiers without verifying ownership or permission levels on the backend.
The operational impact of this disclosure vulnerability extends beyond simple data leakage. In a network fabric environment, sensitive information may include topology maps, virtual machine locations, security policies, and potentially encrypted credentials used for inter-node communication. Disclosure of such data enables an attacker to perform reconnaissance with high precision, mapping out the infrastructure layout without triggering alarms associated with administrative login attempts. This intelligence can be leveraged in subsequent attack phases to identify high-value targets or weak points in the network architecture. Furthermore, if cryptographic keys or session tokens are exposed, it could lead to a complete compromise of confidentiality and integrity for the entire fabric, allowing an attacker to impersonate legitimate components or decrypt sensitive traffic.
Mitigation strategies must focus on rigorous access control implementation and continuous monitoring. Administrators should ensure that HPE Networking Fabric Composer is updated to the latest version provided by Hewlett Packard Enterprise, as patches typically address these authorization flaws by enforcing stricter server-side checks for every API call. Role-based access control (RBAC) policies should be reviewed to ensure they are granular enough to prevent low-privilege users from accessing administrative data sets. Additionally, implementing network segmentation can limit the blast radius if an attacker gains initial foothold with low privileges. Security teams should also monitor logs for anomalous patterns of API requests originating from non-administrative accounts, which may indicate exploitation attempts aligned with ATT&CK techniques such as T1087: Account Discovery or T1539: Steal Web Session Cookie if session data is involved. Regular audits of user permissions and the principle of least privilege are essential to preventing similar exposures in critical infrastructure management tools.