CVE-2026-95759 in Fabric Composer
Summary
by MITRE • 11/03/2026
Audit log bypass vulnerabilities exist in the API of HPE Networking Fabric Composer. Successful exploitation could allow an authenticated attacker with low privileges to suppress the audit records of their activity on the affected system.
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Analysis
by VulDB Data Team • 11/03/2026
The vulnerability identified within the application programming interface of Hewlett Packard Enterprise Networking Fabric Composer represents a critical failure in access control and logging mechanisms, specifically classified under CWE-798: Use of Hard-coded Credentials or CWE-200: Exposure of Sensitive Information to an Unauthorized Actor depending on the specific implementation details regarding how authentication tokens are handled during log generation. This flaw allows for the suppression of audit records associated with user activities, effectively creating a blind spot in the system's observability layer. In enterprise network environments, Fabric Composer serves as a central management point for virtualizing and automating data center networks, making its integrity paramount for maintaining security posture and regulatory compliance. The existence of such a vulnerability undermines the fundamental principle of non-repudiation, which is essential for forensic analysis and accountability in IT operations.
From a technical perspective, the core issue lies in how the API processes requests from authenticated users with low-privilege roles. Typically, audit logging should be an out-of-band process or handled by a privileged system service that operates independently of user permissions to prevent tampering. However, in this instance, the logic governing the creation and storage of audit logs appears to be susceptible to manipulation based on specific input parameters provided by the client application. An attacker who has successfully authenticated with low-level privileges can craft API requests that instruct the backend services not to record certain actions or to delete existing records related to those actions. This bypasses standard logging controls, allowing malicious activities such as configuration changes, policy modifications, or unauthorized access attempts to go undetected by security information and event management systems that rely on these logs for threat detection.
The operational impact of this vulnerability is severe, particularly in environments where compliance with standards like PCI DSS, HIPAA, or SOX requires comprehensive audit trails. By suppressing evidence of their actions, an attacker can maintain persistent access to the network infrastructure without triggering alerts from intrusion detection systems that monitor log anomalies. This capability aligns closely with MITRE ATT&CK technique T1070: Indicator Removal on Host, specifically sub-techniques related to clearing logs or modifying logging configurations. Furthermore, it facilitates lateral movement and privilege escalation by allowing the attacker to operate stealthily while they escalate their privileges within the Fabric Composer environment. The inability to trace past actions complicates incident response efforts significantly, as security teams lose visibility into the scope of compromise and the specific steps taken by the adversary during the attack lifecycle.
Mitigation strategies must focus on both immediate remediation and long-term architectural improvements. Administrators should apply vendor-provided patches that address this API flaw immediately upon release to restore proper audit logging functionality. In addition to patching, it is crucial to implement defense-in-depth measures such as forwarding logs in real-time to a secure, immutable external log server or SIEM platform using protocols like Syslog over TLS or HTTPS with mutual authentication. This ensures that even if the local application on Fabric Composer attempts to suppress records, the copies sent externally remain intact and available for analysis. Access controls should also be reviewed to ensure that only highly privileged administrators have access to audit management functions, adhering to the principle of least privilege. Regular audits of log integrity using checksums or digital signatures can further detect any tampering attempts before they impact forensic investigations.