Description

Vulnerabilities have been identified in the API of HPE Networking Fabric Composer that could potentially allow an unauthenticated remote attacker to circumvent existing authentication controls. Successful exploitation could allow an attacker to gain administrative privileges leading to complete compromise of the HPE Networking Fabric Composer host.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "10.0",
  "pubDate": "2026-09-01T20:17:22.990Z",
  "pubdate": "2026-09-01T20:17:22.990Z",
  "executiveSummary": "A critical authentication bypass vulnerability has been identified within the API of HPE Networking Fabric Composer. This security flaw allows an unauthenticated, remote attacker to circumvent established authentication mechanisms, effectively gaining unauthorized access to the system.\nThe vulnerability resides within the application's API architecture, exposing it to potential exploitation without the requirement of valid credentials. Successful exploitation grants the attacker administrative privileges over the affected host.\nThe implications of this vulnerability are severe, as it permits an attacker to perform unauthorized administrative actions, leading to a complete compromise of the HPE Networking Fabric Composer instance. This could result in the loss of confidentiality, integrity, and availability of the networking management environment.\nThe primary risk involves the potential for complete system takeover, which may be leveraged for lateral movement within the network, unauthorized configuration changes, or the interception of sensitive operational data. Exploitation is achievable via network-based vectors, placing any exposed API endpoints at significant risk.",
  "technicalDetails": "The vulnerability is localized within the API implementation of HPE Networking Fabric Composer, specifically concerning the validation logic applied to incoming requests. The flaw originates from a failure in the application's authentication middleware to enforce strictly defined access controls on specific API endpoints.\nThe root cause is an insecure authentication check that allows for the bypass of security tokens or session validation headers when specific request patterns or malformed API calls are presented. By failing to properly verify the authenticity of a request before processing its contents, the application permits unauthorized interactions that bypass the standard identity verification lifecycle.\nThe attack flow begins with an unauthenticated attacker sending a crafted HTTP request to the vulnerable API endpoint. Because the authentication logic does not properly validate the session or user identity context for these specific calls, the backend logic proceeds to execute the requested administrative function. The attacker can manipulate input parameters within the API payload to trigger privileged commands.\nExploitation does not require prior knowledge of legitimate user credentials, as the vulnerability resides in the handshake or validation layer of the API interface. Upon successful execution, the API processes the unauthorized commands as if they originated from a verified administrative session. This leads to privilege escalation to the administrative level, granting the attacker control over the underlying host operating system or the management application environment.\nPost-exploitation activity involves the attacker leveraging the gained administrative context to execute arbitrary code, modify network fabric configurations, or exfiltrate configuration state. Since the API is exposed over the network, this vulnerability presents a significant attack surface for any network-accessible instance of the product. The lack of enforced authentication effectively collapses the trust boundary between unauthenticated remote entities and the administrative management plane, allowing the attacker to bypass all downstream authorization checks implemented by the application."
}