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CVE-2026-87128 – Unauthenticated Data Tampering / Information Disclosure – Oracle Hyperion Data Rela

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Summary

CVE-2026-87128 is a critical, easily exploitable vulnerability in the "Access and security" component of Oracle Hyperion Data Relationship Management (DRM). It allows an unauthenticated attacker with network access via HTTP to compromise the application, resulting in unauthorized creation, deletion, or modification of critical data as well as full unauthorized read access to all accessible data. The flaw was disclosed by Oracle as part of the September 2026 Critical Security Patch Update and carries a CVSS v3.1 base score of 9.1 (Critical).

Technical details

  • Root cause: An access-control weakness in the Access and security component of Oracle Hyperion Data Relationship Management permits actions that should require authentication to be performed without valid credentials.
  • Trigger conditions: The affected component is reachable over HTTP; no prior authentication or user interaction is required to trigger the flaw.
  • Attack vector: Network (remote), Attack Complexity: Low, Privileges Required: None, User Interaction: None, Scope: Unchanged — consistent with Oracle’s confirmation that the flaw is remotely exploitable without authentication.
  • Impact: High confidentiality impact (full unauthorized access/disclosure of data) and high integrity impact (unauthorized creation, deletion, or modification of critical data). No availability impact is reported.

Affected software

  • Oracle Hyperion Data Relationship Management, version 11.2.26.0.000 (as listed in Oracle’s Critical Security Patch Update Advisory – September 2026 risk matrix).

Severity

  • CVSS v3.1 Base Score: 9.1 (Critical)
  • Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Mitigation and recommended actions

  • Immediate: Apply the fix provided by Oracle in the September 2026 Critical Security Patch Update for Oracle Hyperion Data Relationship Management version 11.2.26.0.000. Oracle strongly recommends applying Critical Patch Update fixes as soon as possible.
  • If patching cannot be performed immediately: Restrict network access to Oracle Hyperion Data Relationship Management to trusted internal networks only, and ensure the HTTP interface for this component is not exposed directly to the internet until the patch is applied. Monitor access and audit logs for unexpected data creation, deletion, or modification activity on DRM objects.

References

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