CVE-2026-84148 in Multi-tenant ERP System
Summary
by MITRE • 09/01/2026
This vulnerability exists in the ERP system due to improper authentication and authorization controls in the API endpoint. An unauthenticated remote attacker could exploit this vulnerability by manipulating parameter which could lead to exposure of sensitive information belonging to other users on the targeted system.
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Analysis
by VulDB Data Team • 09/01/2026
The identified security flaw resides within an Enterprise Resource Planning system, specifically manifesting through inadequate access control mechanisms governing its application programming interface endpoints. This deficiency represents a critical failure in implementing proper authentication and authorization protocols, allowing unauthenticated actors to bypass intended restrictions. The core technical issue stems from the server's inability to properly validate user identity or verify permissions before processing requests directed at sensitive data structures. Consequently, the system fails to enforce isolation between different user contexts, creating an environment where one entity can inadvertently or maliciously access resources belonging to another without valid credentials.
From a classification perspective, this vulnerability aligns with CWE-284, which denotes Improper Access Control, and more specifically reflects characteristics of CWE-639 regarding Authorization Bypass Through User-Controlled Key. The exploitation vector involves an unauthenticated remote attacker manipulating input parameters within the API request to target specific resource identifiers or keys associated with other users' data. By altering these parameters, typically through techniques such as Insecure Direct Object Reference manipulation, the attacker can retrieve confidential information that should remain strictly private. This type of flaw is frequently observed in RESTful APIs where developers assume client-side validation is sufficient or fail to implement robust server-side checks for every request.
The operational impact of this vulnerability is severe, primarily centering on a significant breach of data confidentiality and privacy regulations. Sensitive personal information, financial records, or proprietary business data belonging to legitimate users can be exfiltrated by an external adversary. This exposure not only compromises individual user trust but also exposes the organization to substantial legal liabilities under frameworks such as GDPR or HIPAA if protected health information or personally identifiable information is involved. Furthermore, the ability of an attacker to access arbitrary records without authentication indicates a fundamental weakness in the system's security architecture, potentially serving as a stepping stone for more sophisticated attacks like data aggregation or targeted social engineering campaigns using harvested details.
In terms of threat modeling and adversary behavior, this vulnerability maps directly to MITRE ATT&CK technique T1078, specifically Valid Accounts when considering that even unauthenticated access can be viewed as exploiting trust boundaries, though it is closer to T1528 Steal Application Access Token if tokens were involved. However, since the attack is unauthenticated, it more accurately reflects initial exploitation phases where attackers probe for misconfigurations or logic flaws in API endpoints before attempting deeper intrusion. The lack of proper session management and request validation allows low-skilled threat actors to exploit this flaw using automated tools, increasing the likelihood of successful compromise across multiple instances simultaneously.
To mitigate this vulnerability, immediate remediation efforts must focus on implementing strict access control checks at every level of the application stack. Developers should enforce authentication requirements for all API endpoints that handle sensitive data and ensure that authorization logic verifies whether the authenticated user has permission to access the specific resource requested. Implementing robust input validation is essential, including validating object references against a whitelist or using indirect reference maps rather than exposing sequential IDs directly in URLs. Additionally, adopting security best practices such as principle of least privilege ensures that services operate with minimal necessary permissions. Regular penetration testing and code reviews focused on API security can help identify similar logic flaws before they are exploited in production environments.