CVE-2026-70851: Oracle Hyperion Financial Management DOS

CVE-2026-70851 Overview

CVE-2026-70851 affects Oracle Hyperion Financial Management version 11.2.25.0.000. The vulnerability resides in the Security component and allows a low-privileged attacker with network access via HTTP to trigger a partial denial of service. Successful exploitation impacts only availability. Oracle rates the flaw as difficult to exploit, requiring authenticated access to the application. The issue is tracked under CWE-284: Improper Access Control and was disclosed in the Oracle Security Alert August 2026.

Critical Impact
Authenticated network attackers can degrade the availability of Oracle Hyperion Financial Management, disrupting enterprise financial consolidation and reporting workflows.

Affected Products

Oracle Hyperion Financial Management 11.2.25.0.000
Deployments exposing the Hyperion Financial Management HTTP interface to authenticated users
Environments running the vulnerable Security component of Oracle Hyperion

Discovery Timeline

2026-08-18 - CVE-2026-70851 published to the National Vulnerability Database (NVD)
2026-08-21 - Last updated in the NVD database
August 2026 - Oracle publishes fix guidance in the Oracle Security Alert August 2026

Technical Details for CVE-2026-70851

Vulnerability Analysis

Oracle Hyperion Financial Management is an enterprise performance management application used for financial consolidation and reporting. The vulnerability resides in the Security component, which handles authentication and access control for application requests. An authenticated attacker with low privileges can send crafted HTTP requests that cause the application to enter a degraded state. The result is a partial denial of service, meaning some functionality or throughput of Hyperion Financial Management is disrupted while the underlying host remains operational. The flaw does not expose confidential data or permit data modification. Oracle classifies the attack complexity as high, indicating that specific conditions or timing are required for successful exploitation.

Root Cause

The issue is categorized under CWE-284: Improper Access Control. The Security component fails to correctly constrain how a low-privileged, authenticated user may interact with protected resources or request handlers, allowing that user to induce an availability-impacting condition through the HTTP interface. Oracle has not released public technical details beyond the Oracle Security Alert August 2026.

Attack Vector

Exploitation requires network access to the Hyperion Financial Management HTTP endpoint and valid credentials with low privileges. The attacker sends crafted requests to the Security component to trigger the partial denial of service. No user interaction is required, and the attack does not cross a privilege boundary. There is no public proof-of-concept, no exploit in ExploitDB, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog. The current EPSS probability is 0.253%.

No verified proof-of-concept code is publicly available for CVE-2026-70851.
Refer to the Oracle Security Alert August 2026 for vendor-provided technical guidance.

Detection Methods for CVE-2026-70851

Indicators of Compromise

Unexpected spikes in HTTP 5xx responses or request latency from the Hyperion Financial Management application server
Repeated authenticated requests from a single low-privileged account targeting Security component endpoints
Application logs showing thread exhaustion, worker restarts, or transient service unavailability

Detection Strategies

Baseline normal request rates per authenticated Hyperion user and alert on statistically significant deviations
Correlate Hyperion application logs with web server and reverse proxy logs to identify malformed or abusive request patterns targeting the Security component
Track availability metrics for Hyperion Financial Management modules to detect partial functional degradation

Monitoring Recommendations

Forward Hyperion Financial Management, WebLogic, and HTTP access logs to a centralized logging or SIEM platform for retention and analysis
Monitor authenticated session activity for accounts with only low-privileged Hyperion roles
Alert on service restarts, JVM heap pressure, and thread pool saturation on Hyperion application servers

How to Mitigate CVE-2026-70851

Immediate Actions Required

Apply the fix published in the Oracle Security Alert August 2026 to Oracle Hyperion Financial Management 11.2.25.0.000
Inventory all Hyperion Financial Management deployments and confirm patch status against Oracle's guidance
Review Hyperion user accounts and remove or disable unused low-privileged accounts that could be leveraged for authenticated abuse

Patch Information

Oracle addresses CVE-2026-70851 in the August 2026 Security Alert cycle. Administrators should follow the remediation instructions in the Oracle Security Alert August 2026 and apply the referenced patch to affected Hyperion Financial Management 11.2.25.0.000 installations. Confirm patch application by validating build identifiers per Oracle documentation.

Workarounds

Restrict network access to the Hyperion Financial Management HTTP interface to trusted management networks and named service accounts
Enforce rate limiting and connection quotas at the reverse proxy or web application firewall protecting Hyperion
Apply strong monitoring on privileged and low-privileged Hyperion sessions until the vendor patch is deployed

bash

# Example: restrict Hyperion HTTP access at the reverse proxy layer
# (adapt to your web server or WAF configuration)
allow  10.0.0.0/8;      # internal finance segment
deny   all;             # block untrusted networks
limit_req zone=hyperion burst=20 nodelay;