CVE-2026-56579 in MyCloud
Summary
by MITRE • 07/21/2026
HCL MyCloud was affected with License Key Revealed in HTTP Response. It may enable attackers to misuse the exposed information and compromise the application's security.
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Analysis
by VulDB Data Team • 07/21/2026
The vulnerability in HCL MyCloud involving license key exposure within HTTP responses represents a critical security flaw that undermines the application's authorization mechanisms and overall defensive posture. This issue falls under the category of sensitive data exposure, where proprietary licensing information is inadvertently transmitted in cleartext within HTTP response bodies rather than being properly secured or removed from the communication channel. The exposure occurs at the application layer where license validation processes typically return licensing details as part of the standard response flow, creating an opportunity for attackers to intercept and analyze these communications using network monitoring tools or by exploiting man-in-the-middle attack vectors.
The technical nature of this vulnerability stems from improper input/output handling within the application's license verification subsystem, where license keys are not adequately sanitized or filtered before being included in HTTP responses. This flaw directly contravenes secure coding practices and security best practices outlined in industry standards such as the owasp top ten category a03:2021 - sensitive data exposure, which specifically addresses the improper handling of sensitive information within application responses. The vulnerability demonstrates a lack of proper access control enforcement and credential management within the application's architecture, potentially allowing unauthorized parties to obtain valid license keys that could be used for unauthorized software usage or to compromise the integrity of the licensing system.
Operationally, this exposure creates significant risk for both the software vendor and end users who deploy HCL MyCloud solutions. Attackers who intercept HTTP traffic can readily extract valid license key information, enabling them to bypass legitimate licensing requirements and potentially gain access to premium features or services without proper authorization. This vulnerability also impacts the application's security model by providing attackers with potential insights into the licensing system architecture, which could be leveraged in subsequent attacks targeting other components of the platform. The exposure may facilitate unauthorized software distribution, revenue loss for the vendor, and create opportunities for attackers to establish persistent access through legitimate license keys that can be used in conjunction with other attack vectors.
Mitigation strategies for this vulnerability should focus on comprehensive input/output sanitization and secure response handling practices within the application's HTTP communication stack. Security controls must include implementing proper data filtering mechanisms that prevent sensitive licensing information from being included in HTTP responses unless explicitly required for legitimate operational purposes. Organizations should implement network-level protections such as tls encryption to prevent plaintext transmission of license information, while also ensuring that application-level logging and monitoring systems do not inadvertently capture or expose license key details. The remediation process should involve comprehensive code review and security testing to identify all instances where licensing information might be exposed in responses, aligning with the cwe-20: improper input validation category that addresses weaknesses in how applications handle input data. Additionally, implementing proper access control measures and privilege separation within the application architecture will help prevent unauthorized access to license management functions that could lead to further exploitation opportunities.