CVE-2026-56581 in MyCloud
Summary
by MITRE • 07/21/2026
HCL MyCloud was affected with Cookie Attribute Path Not Set. It may increase the risk of unauthorized access to session data or authentication tokens.
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Analysis
by VulDB Data Team • 07/21/2026
The vulnerability identified in HCL MyCloud relates to the improper configuration of cookie attributes, specifically the absence of the path attribute in session cookies. This configuration flaw represents a significant security weakness that directly impacts session management and authentication mechanisms within the application. When cookies lack proper path specification, they become accessible across all directories and subdirectories of the web application, creating an expanded attack surface for potential adversaries seeking to exploit session hijacking or credential theft attacks.
This vulnerability falls under the category of improper cookie handling as defined by CWE-614, which specifically addresses the insecure storage and transmission of session cookies. The path attribute in HTTP cookies serves as a crucial security control that restricts cookie access to specific paths within a web application, thereby limiting the scope of potential cookie theft attacks. Without this attribute, an attacker who successfully obtains a valid session cookie can potentially use it across different sections of the application, significantly increasing the impact of any successful session hijacking attempt.
The operational impact of this vulnerability extends beyond simple session management concerns and creates multiple attack vectors for threat actors. When cookies lack proper path restrictions, they become vulnerable to cross-site scripting attacks where malicious scripts can access session data from any part of the application. This weakness particularly affects applications that implement shared authentication mechanisms or have complex directory structures, as it removes the boundary controls that would normally prevent cookie access across different functional areas of the system. The vulnerability essentially undermines the principle of least privilege in session management, allowing unauthorized access to session tokens that should be restricted to specific application paths.
From an attacker perspective, this flaw enables more sophisticated attack patterns that align with techniques documented in the MITRE ATT&CK framework under the credential access and persistence domains. Attackers can leverage this vulnerability to perform session hijacking across different application modules, potentially gaining access to administrative functions or sensitive user data without requiring additional authentication bypasses. The reduced scope of cookie protection makes it easier for attackers to maintain persistent access and escalate privileges within the application environment.
The recommended remediation approach involves implementing proper cookie attribute configuration that includes the path attribute set to the specific directory where the session cookie should be accessible. This configuration should be applied consistently across all session cookies used by the application, with appropriate path values that match the actual application structure. Security headers such as HttpOnly and Secure flags should also be properly configured alongside path attributes to provide comprehensive cookie security. Additionally, implementing proper input validation and output encoding practices can help prevent attackers from exploiting this vulnerability through cross-site scripting or other injection-based attacks that might be used to obtain session data. The solution requires careful testing to ensure that legitimate application functionality is not disrupted while maintaining appropriate access controls and security boundaries for all session management components.