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CVE-2026-87197 – Unauthenticated Data Exposure and Tampering – Oracle Hyperion Financial Management

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Summary

CVE-2026-87197 is a high-severity vulnerability in the Security component of Oracle Hyperion Financial Management, version 11.2.26.0.000. The flaw is easily exploitable and allows an unauthenticated attacker with network access via HTTP to gain unauthorized access to critical data and modify certain accessible information, without requiring any user interaction. Oracle disclosed the issue as part of its September 2026 Critical Security Patch Update.

Technical details

  • Root cause: An access control weakness in the Security component of Oracle Hyperion Financial Management that permits actions to be performed without proper authentication.
  • Trigger conditions: An attacker only needs network-level access to the HTTP interface exposed by the affected Hyperion Financial Management deployment; no valid credentials or user interaction are required.
  • Attack vector: Network-based (AV:N), low attack complexity (AC:L), no privileges required (PR:N), no user interaction (UI:N).
  • Impact: Successful exploitation results in unauthorized access to critical, sensitive data (high confidentiality impact) and the ability to modify certain accessible information (low integrity impact). There is no reported impact to availability.

Affected software

  • Oracle Hyperion Financial Management, version 11.2.26.0.000

Severity

  • CVSS v3.1 Base Score: 8.2 (High)
  • Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N

Mitigation and recommended actions

  • Immediate: Apply the patch provided by Oracle in the September 2026 Critical Security Patch Update for Oracle Hyperion Financial Management 11.2.26.0.000. Oracle strongly recommends that customers apply security patches as soon as possible.
  • If patching cannot be performed immediately:
    • Restrict network access to the Hyperion Financial Management HTTP interface to trusted internal networks only, and avoid direct exposure to the internet.
    • Place the application behind a properly configured reverse proxy, VPN, or web application firewall that limits access to authenticated, authorized sources.
    • Monitor logs for anomalous unauthenticated requests to Hyperion Financial Management endpoints while remediation is in progress.

References

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