CVE-2026-73718 in Fabric Composer
Summary
by MITRE • 09/01/2026
A vulnerability in the web-based management interface of HPE Networking Fabric Composer could allow an unauthenticated remote attacker to access sensitive information if the attacker can convince an authenticated user of the interface to interact with a specially crafted URL. Successful exploitation could allow an attacker to retrieve information which could be used to potentially gain further access to network services supported by HPE Networking Fabric Composer.
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Analysis
by VulDB Data Team • 09/01/2026
The vulnerability identified in Hewlett Packard Enterprise (HPE) Networking Fabric Composer represents a significant security risk rooted in the application's handling of user interactions within its web-based management interface. This flaw is characteristic of Cross-Site Request Forgery, commonly referred to as CSRF or XSRF, where an attacker exploits the trust that a trusted website has in a user's browser. In this specific context, the vulnerability allows for unauthorized access to sensitive information not through direct exploitation of authentication mechanisms, but by manipulating authenticated users into performing unintended actions. The core technical flaw lies in the lack of sufficient validation or verification on server-side requests initiated from the web interface, particularly those involving state-changing operations or data retrieval that rely solely on session cookies without additional anti-CSRF tokens or origin checks to confirm the legitimacy of the request source.
The operational impact of this vulnerability is severe due to its reliance on social engineering tactics combined with technical exploitation. An unauthenticated remote attacker cannot directly access the system but can craft a malicious URL designed to trigger specific requests within the Fabric Composer interface when accessed by an authenticated administrator or user. If such a user clicks the link while logged into their session, the browser automatically includes authentication credentials in the request headers due to standard HTTP cookie behavior. This allows the attacker to bypass authentication controls and retrieve sensitive configuration data, network topology details, or other critical information stored within the Fabric Composer database. The retrieved information can serve as reconnaissance material for further attacks against the underlying network infrastructure managed by HPE Networking Fabric Composer.
From a classification perspective, this vulnerability aligns with CWE-352, which defines Cross-Site Request Forgery (CSRF). It also maps to MITRE ATT&CK technique T1078, specifically Valid Accounts, as it involves leveraging legitimate credentials through manipulation rather than theft. The attack vector falls under Initial Access via Spearphishing Link or Trusted Relationship exploitation, where the attacker uses a crafted link to trick an insider into executing actions on behalf of the attacker within a trusted application environment. This type of vulnerability is particularly dangerous in network management platforms because these systems often hold administrative privileges over critical infrastructure components such as switches, routers, and virtual networks.
Mitigation strategies must focus on implementing robust anti-CSRF protections at both the client and server levels. Developers should enforce strict origin validation to ensure that requests originate from expected domains rather than arbitrary external sources. Additionally, implementing synchronizer tokens or double-submit cookie patterns can effectively prevent unauthorized state-changing actions by requiring a secret value known only to the application and the user's browser session. For administrators currently exposed to this risk, immediate steps include restricting access to the Fabric Composer interface through network segmentation, ensuring that management interfaces are not accessible from untrusted networks, and enforcing multi-factor authentication where possible to add an additional layer of verification beyond simple session cookies. Regular security audits and penetration testing should be conducted to identify similar weaknesses in other web-based management consoles within the enterprise environment.