CVE-2026-87134 in Hyperion Data Relationship Management
Summary
by MITRE • 09/16/2026
Vulnerability in the Oracle Hyperion Data Relationship Management product of Oracle Hyperion (component: Access and security). The supported version that is affected is 11.2.26.0.000. Easily exploitable vulnerability allows low privileged attacker with network access via TCP to compromise Oracle Hyperion Data Relationship Management. While the vulnerability is in Oracle Hyperion Data Relationship Management, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all Oracle Hyperion Data Relationship Management accessible data. CVSS 3.1 Base Score 7.7 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N).
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Analysis
by VulDB Data Team • 09/16/2026
The identified vulnerability resides within the Access and security component of Oracle Hyperion Data Relationship Management, specifically affecting version 11.2.26.0.000. This flaw represents a critical weakness in the authentication or authorization mechanisms that govern how users interact with sensitive financial data models. The core technical issue allows for an unauthorized access scenario where the system fails to properly validate credentials or session tokens before granting entry to protected resources. This deficiency enables low-privileged attackers, who possess valid network connectivity via TCP, to bypass intended security controls and gain elevated privileges within the application environment.
From a technical perspective, this vulnerability aligns with CWE-287, which describes Improper Authentication, and potentially CWE-306 for Missing Authentication for Critical Function if the flaw involves specific administrative actions. The attack vector is classified as Network (AV:N) with Low Complexity (AC:L), indicating that no specialized conditions or user interaction are required to exploit the issue beyond having network access. Crucially, the vulnerability exhibits a Scope Change characteristic (S:C), meaning that while the initial breach occurs in Oracle Hyperion Data Relationship Management, the compromise can cascade into other integrated products within the broader Oracle Hyperion ecosystem. This lateral movement capability significantly amplifies the risk profile, as attackers may pivot from one application to another, leveraging shared credentials or session states to expand their foothold across the enterprise infrastructure.
The operational impact of this vulnerability is severe due to its high confidentiality rating in the CVSS 3.1 scoring model, which assigns a base score of 7.7. Successful exploitation results in unauthorized access to critical financial data and potentially complete access to all accessible information within Oracle Hyperion Data Relationship Management. This level of exposure poses substantial risks to organizations relying on this platform for enterprise performance management, budgeting, forecasting, and reporting. The loss of confidentiality could lead to the leakage of proprietary financial strategies, sensitive employee compensation details, or strategic business plans. Furthermore, given the scope change aspect, the integrity and availability of other connected systems may also be indirectly threatened if attackers use the initial access point as a springboard for further malicious activities such as data manipulation or service disruption.
In terms of threat modeling, this vulnerability maps to ATT&CK technique T1078, Valid Accounts, particularly when exploited by insiders or through credential theft, and potentially T1528, Steal Application Access Token, if session hijacking is involved in the exploitation chain. The ability for low-privileged users to escalate their access highlights a failure in principle of least privilege enforcement within the application architecture. Attackers can leverage this flaw to exfiltrate large volumes of structured data without triggering typical high-severity alerts associated with brute-force or injection attacks, making detection more challenging through standard perimeter defenses alone.
To mitigate these risks, immediate action is required to apply the latest security patches provided by Oracle for version 11.2.26.0.000 and subsequent updates that address this specific access control flaw. Organizations should also implement network segmentation strategies to isolate Hyperion servers from general corporate networks where possible, limiting the attack surface available to potential adversaries. Additionally, enforcing multi-factor authentication (MFA) for all administrative and user accounts accessing the platform can significantly reduce the likelihood of successful exploitation even if credentials are compromised. Regular auditing of access logs is recommended to detect anomalous login patterns or unauthorized data retrieval attempts that may indicate an ongoing exploit attempt. Finally, reviewing and tightening role-based access controls ensures that users operate with only the minimum permissions necessary for their job functions, thereby reducing the potential impact should a vulnerability be successfully leveraged in the future.