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CVE-2026-87223 – Unauthenticated Data Tampering & DoS – Oracle Hyperion Financial Management 11.2.26

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Summary

CVE-2026-87223 is a critical, unauthenticated vulnerability in the Security component of Oracle Hyperion Financial Management. A remote, unauthenticated attacker can send crafted HTTP requests to compromise the application, resulting in unauthorized creation, deletion, or modification of critical data and denial-of-service (application hang or crash) conditions. Oracle rates this flaw 9.1 (Critical) on the CVSS v3.1 scale as part of its September 2026 Critical Patch Update.

Technical details

  • Root cause: A flaw in the authentication/authorization mechanism of the Security component of Oracle Hyperion Financial Management that fails to properly restrict access to sensitive operations.
  • Trigger conditions: The vulnerability is remotely exploitable over HTTP without requiring any credentials or user interaction, and Oracle describes it as "easily exploitable," indicating low attack complexity.
  • Attack vector: Network — an attacker only needs HTTP access to the exposed Hyperion Financial Management interface; no prior authentication or privileges are required.
  • Impact: Successful exploitation can lead to unauthorized creation, deletion, or modification of critical application data (high integrity impact) and can cause the application to hang or crash (high availability impact). Oracle’s advisory notes there is no impact to confidentiality (data disclosure) for this specific CVE.

Affected software

  • Oracle Hyperion Financial Management version 11.2.26.0.000

Severity

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

Mitigation and recommended actions

  • Immediate: Apply the patch provided in Oracle’s September 2026 Critical Patch Update (CPU) for Oracle Hyperion Financial Management 11.2.26.0.000. Oracle strongly recommends applying security patches as soon as possible.
  • If patching cannot be performed immediately:
    • Restrict network access to Hyperion Financial Management HTTP/HTTPS interfaces to trusted internal networks or VPN only, minimizing exposure to the public internet.
    • Place the application behind a web application firewall (WAF) or reverse proxy with strict access controls until the patch can be applied.
    • Monitor Hyperion Financial Management logs for unusual or unauthenticated requests targeting the Security component.
    • Follow Oracle’s official Critical Patch Update advisory for the exact patch identifiers and installation instructions applicable to your deployment.

References

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