CVE-2026-21758 in Hive
Summary
by MITRE • 08/25/2026
HCL Hive is affected by an information disclosure vulnerability, which could lead to an attacker gathering sensitive information about the host environment.
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Analysis
by VulDB Data Team • 08/25/2026
The identified security flaw within HCL Hive represents a critical class of vulnerabilities categorized under CWE-200, commonly known as Information Exposure. This specific weakness allows unauthorized entities to access data that is intended for internal use or restricted audiences, thereby compromising the confidentiality of the system's operational context. In enterprise environments where HCL Hive serves as a component for big data processing and analytics, such exposure can reveal sensitive architectural details, configuration parameters, or underlying infrastructure metadata that are not meant to be visible to external actors. The presence of this vulnerability indicates a failure in proper access control mechanisms or insufficient sanitization of diagnostic outputs, which collectively create an avenue for adversaries to map the target environment with greater precision than intended by the system administrators.
From a technical perspective, information disclosure vulnerabilities often stem from misconfigured error handling routines, verbose logging settings left enabled in production environments, or API endpoints that return excessive data without adequate filtering. In the context of HCL Hive, this could manifest through HTTP responses containing stack traces, database connection strings, internal IP addresses, or version numbers of dependent libraries when specific requests are made to unsecured endpoints. These details serve as valuable intelligence for attackers during the reconnaissance phase of a cyber attack lifecycle. By gathering such information, an adversary can identify potential entry points, understand the technology stack in use, and tailor subsequent exploits to target known weaknesses associated with the exposed software versions or configurations. This aligns directly with MITRE ATT&CK technique T1592, which covers Gather Victim Host Information, a critical step that precedes more destructive actions such as privilege escalation or lateral movement within the network.
The operational impact of this vulnerability extends beyond mere data leakage; it significantly increases the attack surface and facilitates further malicious activities. Once an attacker possesses detailed knowledge of the host environment, they can craft targeted payloads that bypass generic security controls designed to stop broad-spectrum attacks. For instance, knowing specific library versions allows for the use of known exploit code found in public repositories or commercial toolkits. Furthermore, exposure of internal network topology or service dependencies can aid in lateral movement strategies, enabling the attacker to pivot from a compromised node to more critical systems within the organization's infrastructure. This undermines the principle of least privilege and erodes trust in the security posture of the HCL Hive deployment, potentially leading to regulatory non-compliance if sensitive customer data is inadvertently exposed through these informational leaks.
To mitigate this risk, organizations must implement strict access controls on all administrative interfaces and diagnostic endpoints associated with HCL Hive. It is essential to ensure that only authenticated users with appropriate privileges can access detailed system information or configuration settings. Additionally, developers and administrators should review error handling mechanisms to prevent the leakage of stack traces or internal states in production environments; instead, generic error messages should be displayed while logging detailed diagnostics securely on the server side for authorized personnel only. Regular vulnerability assessments and penetration testing should be conducted to identify similar exposure points across the application ecosystem. Keeping HCL Hive updated with the latest patches provided by HCL Technologies is also crucial, as vendors often release fixes that address these information disclosure flaws alongside other security enhancements. Finally, implementing network segmentation can limit the blast radius of any successful exploitation by restricting direct access to sensitive internal services from untrusted networks.