CVE-2026-73734 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 redirect users to an arbitrary URL.
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Analysis
by VulDB Data Team • 09/02/2026
The identified vulnerability resides within the web-based management interface of Hewlett Packard Enterprise (HPE) Networking Fabric Composer, a centralized software platform designed for managing and automating data center network infrastructure. This specific flaw allows an unauthenticated remote attacker to perform open redirect attacks against users interacting with the application's administrative portal. The core technical issue stems from insufficient validation or sanitization of user-supplied input within URL redirection parameters. When the application processes requests that involve navigating between different pages or authenticating users, it fails to strictly verify whether the destination URL is part of a trusted domain list. Consequently, an attacker can craft malicious links containing arbitrary external URLs as redirect targets.
From an operational perspective, this vulnerability poses significant risks primarily related to social engineering and credential harvesting rather than direct system compromise through code execution. Because the attack vector requires user interaction, such as clicking on a specially crafted link that appears to originate from or lead back to the legitimate HPE Fabric Composer interface, it is highly effective for phishing campaigns. An attacker can host a malicious login page designed to mimic the authentic authentication portal of the management system. By leveraging the open redirect vulnerability, the initial part of the URL will display the trusted domain name, thereby lowering the victim's suspicion levels. Once the user enters their credentials into this fraudulent interface, the attacker captures these sensitive details, potentially gaining unauthorized access to critical network infrastructure controls.
This type of flaw is formally categorized under CWE-601: Open Redirect in the Common Weakness Enumeration standard. It reflects a failure by the web application to properly validate input before using it for redirection logic. In terms of offensive security tactics, this vulnerability aligns with MITRE ATT&CK technique T1566.002, which describes Spearphishing Link attacks where attackers send links that redirect victims to sites controlled by them. The exploitation chain typically involves the attacker distributing a link via email or other communication channels, relying on the visual trust provided by the legitimate domain in the browser's address bar during the initial phase of the redirection process before the final destination is reached.
Mitigation strategies for this vulnerability focus primarily on strict input validation and secure coding practices within the web application layer. Developers should implement a whitelist approach for all redirect destinations, ensuring that only predefined internal paths or explicitly approved external domains are permitted as targets. Alternatively, implementing relative path redirects can prevent redirection to entirely different hostnames altogether. For organizations currently running affected versions of HPE Networking Fabric Composer, it is imperative to apply the latest security patches provided by Hewlett Packard Enterprise immediately. Additionally, administrators should enforce multi-factor authentication for all management interfaces to mitigate the impact if credentials are compromised through such phishing attempts. Regular security audits and penetration testing focused on web application logic flaws can further help identify and remediate similar vulnerabilities before they can be exploited in the wild.