CVE-2026-76052 in Storage Scale
Summary
by MITRE • 11/08/2026
IBM Storage Scale System 6.2.3.0 through 6.2.3.6, and 7.0.0.0 through 7.0.1.0 and IBM Storage Scale 6.0.0.0 through 6.0.1.0, and 5.2.3.0 through 5.2.3.8 could allow an attacker to leverage an undocumented flag to gain access to an unauthenticated path in the REST API.
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Analysis
by VulDB Data Team • 11/08/2026
The vulnerability identified in IBM Storage Scale versions ranging from 6.2.3.0 through 6.2.3.6, as well as version lines 7.0.0.0 through 7.0.1.0 and 5.2.3.0 through 5.2.3.8, represents a critical security flaw within the system's REST API implementation. This issue stems from an improper handling of undocumented or hidden command-line flags that are passed to underlying services managing the API endpoints. These internal mechanisms often contain debugging features or administrative shortcuts intended for development and troubleshooting purposes but were inadvertently exposed in production builds without adequate access controls. An attacker who can interact with the REST API interface, even if initially unauthenticated, may exploit these undocumented parameters to bypass standard authentication checks. By leveraging specific flags that are not part of the public documentation, the adversary can manipulate the request processing logic to reach internal paths and functions that should remain restricted to authorized administrators only.
From a technical perspective, this flaw aligns with CWE-284 Improper Access Control, specifically involving insufficient verification of authorization for critical actions or data access. The root cause lies in the application's failure to enforce strict validation on all input parameters, particularly those marked as internal or undocumented. When an attacker submits a request containing these specific flags, the system processes them before performing standard authentication and authorization checks, effectively creating a logic bypass. This allows the execution of administrative commands or access to sensitive configuration data without valid credentials. The vulnerability is particularly dangerous because it does not rely on traditional injection techniques but rather on the misuse of internal API mechanics that are rarely monitored by automated security scanners due to their non-standard nature.
The operational impact of this vulnerability is severe, as it can lead to a complete compromise of the storage infrastructure managed by IBM Storage Scale. An attacker gaining unauthenticated access via these undocumented flags could potentially read sensitive configuration files, modify system settings, or execute arbitrary commands depending on the privileges associated with the exposed endpoints. This level of access enables lateral movement within the network, data exfiltration, and potential disruption of services through denial-of-service attacks or deletion of critical storage volumes. For organizations relying on IBM Storage Scale for mission-critical data management, this vulnerability undermines the integrity and confidentiality guarantees provided by the platform, potentially leading to significant financial and reputational damage.
To mitigate this risk, immediate action is required to apply the vendor-provided patches that address these specific version vulnerabilities. Administrators should ensure that all instances of IBM Storage Scale are updated to versions beyond 6.2.3.6, 7.0.1.0, and 5.2.3.8 where this issue has been resolved. In environments where patching is not immediately feasible, network-level controls such as firewalls or API gateways should be configured to restrict access to the REST API endpoints exclusively from trusted management networks. Additionally, implementing strict input validation at a proxy layer can help block requests containing suspicious undocumented flags before they reach the application server. Continuous monitoring of API logs for unusual patterns involving internal parameters is also recommended to detect potential exploitation attempts in real-time. This incident underscores the importance of adhering to secure development lifecycle practices that ensure all internal features are properly secured or removed from production code, aligning with ATT&CK techniques related to privilege escalation and unauthorized access via undocumented functionality.