CVE-2026-95772 in Fabric Composer
Summary
by MITRE • 11/03/2026
A race condition vulnerability exists in the API of HPE Networking Fabric Composer. Successful exploitation could allow an authenticated attacker with low privileges to corrupt the configuration state of the affected system.
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Analysis
by VulDB Data Team • 11/03/2026
The identified vulnerability represents a classic race condition within the application programming interface of HPE Networking Fabric Composer, specifically affecting systems where administrative or operational configurations are managed through concurrent API calls. This flaw arises from a failure in proper synchronization mechanisms when handling shared resources during configuration updates. In such scenarios, multiple requests can access and modify critical state variables simultaneously without adequate locking or atomic operations, leading to unpredictable behavior. The vulnerability is particularly concerning because it allows exploitation by an authenticated attacker with low privileges, indicating that the security boundary between standard user roles and administrative functions is insufficiently enforced at the code level during these specific API interactions.
From a technical perspective, this race condition likely involves a time-of-check-to-time-of-use (TOCTOU) flaw where the system verifies permissions or validates input state before proceeding with an operation but fails to maintain that validated state throughout the entire execution flow. When two or more threads process configuration requests in parallel, one thread may read the current configuration state while another modifies it simultaneously. This lack of atomicity can result in partial writes, overwritten data, or inconsistent database entries within the Fabric Composer's internal storage. The core issue lies in the application logic not serializing access to critical configuration objects effectively, allowing an attacker to manipulate the timing of requests to force a specific sequence of operations that bypasses intended validation checks or leaves the system in a corrupted state.
The operational impact of this vulnerability is significant for network infrastructure integrity. Successful exploitation enables an authenticated low-privilege user to corrupt the configuration state of the HPE Networking Fabric Composer. This corruption can manifest as misconfigured network policies, disrupted traffic flows, or even complete unavailability of management services depending on which components are affected. An attacker could potentially escalate their influence by manipulating these configurations to create backdoors, redirect traffic for interception, or cause denial-of-service conditions that require manual intervention to resolve. The ability to corrupt configuration state undermines the reliability and trustworthiness of the network orchestration platform, posing risks to both operational continuity and broader security postures within the data center environment managed by Fabric Composer.
This vulnerability aligns with CWE-362, which describes concurrent execution using shared resources with improper synchronization, leading to race conditions. It also relates to CWE-841, specifically regarding improper enforcement of a behavioral constraint during state transitions. In terms of offensive security frameworks, this flaw facilitates the MITRE ATT&CK technique T1078, Valid Accounts, as it leverages existing low-level credentials to perform unauthorized modifications. Furthermore, the act of corrupting configuration states falls under T1562, Impair Defenses, by degrading the functionality of security monitoring and management tools inherent in the Fabric Composer platform.
Mitigation strategies should focus on both immediate remediation and long-term architectural improvements. The primary defense is to apply vendor-provided patches that address the synchronization issues within the API handlers responsible for configuration updates. Administrators must ensure all instances are updated promptly upon release of security advisories. In addition, implementing strict role-based access control (RBAC) policies can limit exposure by ensuring only high-privilege accounts have access to sensitive configuration endpoints until the patch is applied. Logging and monitoring should be enhanced to detect unusual patterns of concurrent API calls that may indicate exploitation attempts. Finally, adopting secure coding practices such as using atomic operations for state changes and implementing robust locking mechanisms in future development cycles will prevent similar race conditions from recurring within the platform's codebase.