CVE-2026-87171 in Hyperion Financial Management
Summary
by MITRE • 09/16/2026
Vulnerability in the Oracle Hyperion Financial Management product of Oracle Hyperion (component: Security). The supported version that is affected is 11.2.26.0.000. Difficult to exploit vulnerability allows unauthenticated attacker with network access via HTTPS to compromise Oracle Hyperion Financial Management. While the vulnerability is in Oracle Hyperion Financial Management, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Oracle Hyperion Financial Management accessible data as well as unauthorized access to critical data or complete access to all Oracle Hyperion Financial Management accessible data. CVSS 3.1 Base Score 8.7 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N).
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Analysis
by VulDB Data Team • 09/16/2026
The identified vulnerability resides within the Security component of Oracle Hyperion Financial Management, specifically affecting version 11.2.26.0.000 and potentially other supported releases in the suite. This flaw represents a critical security deficiency that permits unauthenticated attackers to compromise the integrity and confidentiality of the application environment. The attack vector is network-based via HTTPS, which allows remote exploitation without requiring user interaction or prior authentication credentials. Despite being classified as difficult to exploit due to high complexity requirements for successful execution, the severity rating remains substantial because it bypasses fundamental access controls entirely. This characteristic distinguishes it from typical injection flaws by relying on intricate state manipulation or logic errors rather than simple input sanitization failures.
The technical nature of this vulnerability centers on a failure in the authentication and authorization mechanisms that govern data operations within the Hyperion Financial Management platform. By leveraging specific sequences of requests over HTTPS, an attacker can manipulate internal application states to bypass security checks designed to restrict access based on user roles or permissions. This flaw effectively neutralizes the perimeter defense provided by the web server interface, allowing direct interaction with backend services that should be restricted to authenticated administrators or authorized users only. The complexity involved in crafting a successful exploit suggests that the vulnerability may involve race conditions, session fixation techniques, or complex API endpoint misconfigurations that require precise timing and parameter manipulation to trigger unintended behavior within the application logic.
The operational impact of this vulnerability is severe due to its broad scope and high-impact consequences. Successful exploitation grants an attacker unauthorized capabilities to create, delete, or modify critical financial data stored within the Oracle Hyperion Financial Management database. This directly compromises the integrity of sensitive corporate financial records, which are essential for regulatory compliance, auditing, and strategic decision-making. Furthermore, the vulnerability enables complete access to all accessible data within the system, leading to a total breach of confidentiality. The scope change noted in the advisory indicates that this flaw does not remain isolated to Hyperion Financial Management but can significantly impact additional products integrated with or dependent on it, thereby expanding the blast radius across the enterprise IT infrastructure and potentially exposing interconnected systems to further compromise.
From a classification perspective, this vulnerability aligns closely with CWE-287, which describes Improper Authentication, as well as CWE-922 for Insecure Storage of Sensitive Information if data exfiltration is confirmed. The attack pattern corresponds to MITRE ATT&CK technique T1078, Valid Accounts, although in this case the attacker achieves valid account privileges without possessing actual credentials through logical exploitation rather than credential theft. Additionally, the ability to modify and delete data maps to techniques such as T1485 Data Destruction or T1099 Taint Shared Content depending on the specific method used for persistence or impact. The high confidentiality and integrity impacts reflected in the CVSS 3.1 base score of 8.7 underscore the critical nature of this flaw, particularly given its potential to disrupt financial reporting cycles and violate data governance policies mandated by standards such as SOX or GDPR.
Mitigation strategies must prioritize immediate patching if an official Oracle Security Patch Update is available for version 11.2.26.0.000. In the interim, organizations should implement strict network segmentation to restrict HTTPS access to Hyperion Financial Management endpoints only from trusted administrative subnets and known IP ranges. Web Application Firewalls can be configured with custom rulesets to detect anomalous request patterns associated with complex exploitation attempts, although such defenses are secondary to proper patching. Access control lists on the underlying database should also be reviewed to ensure that even if application-level controls fail, direct database access remains restricted. Continuous monitoring of system logs for unusual data modification events or unauthorized login attempts is essential to detect potential exploitation activities early and minimize the window of exposure during remediation efforts.