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CVE-2026-87188 – Unauthenticated Remote Code Execution / Full System Compromise – Oracle Hyperion Fi

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Summary

CVE-2026-87188 is a critical, unauthenticated vulnerability in the Security component of Oracle Hyperion Financial Management version 11.2.26.0.000. The flaw is remotely exploitable over HTTP without any credentials or user interaction, and successful exploitation results in complete compromise of the affected system’s confidentiality, integrity, and availability. Oracle rates the issue as easily exploitable and has assigned it a CVSS v3.1 base score of 9.8 (Critical).

Technical details

  • Root cause: A weakness in the Security component of Oracle Hyperion Financial Management that allows an attacker to bypass access controls and take over the application.
  • Trigger conditions: No authentication or user interaction is required; the attacker only needs network access to the HTTP interface exposed by the vulnerable Hyperion Financial Management deployment.
  • Attack vector: Network-based (AV:N), low attack complexity (AC:L), no privileges required (PR:N), no user interaction (UI:N), delivered via HTTP requests to the application.
  • Impact: Successful exploitation grants an unauthenticated attacker full control ("complete takeover") of Oracle Hyperion Financial Management, with high impact to confidentiality, integrity, and availability of the underlying data and system.

Affected software

  • Oracle Hyperion Financial Management, version 11.2.26.0.000

Severity

  • CVSS v3.1 Base Score: 9.8 (Critical)
  • Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Mitigation and recommended actions

  • Immediate: Apply the Oracle Critical Security Patch Update that addresses CVE-2026-87188 for Oracle Hyperion Financial Management 11.2.26.0.000. Refer to Oracle’s official Critical Security Patch Update advisory for the specific patch identifier and installation instructions for your platform.
  • If patching cannot be applied immediately: Restrict network access to the Hyperion Financial Management HTTP interface to trusted internal networks or VPN-only access, and place the application behind a web application firewall or reverse proxy that limits exposure to the internet until the patch can be deployed.
  • Monitor Hyperion Financial Management access and application logs for anomalous, unauthenticated requests to the Security component as a compensating detective control while remediation is in progress.
  • Prioritize patching for any internet-facing Hyperion Financial Management instances, given the unauthenticated, network-exploitable nature of this vulnerability.

References

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