CVE-2026-87199: Oracle Hyperion Financial Management DOS

CVE-2026-87199 Overview

CVE-2026-87199 is a denial-of-service vulnerability in Oracle Hyperion Financial Management, part of the Oracle Hyperion product family. The flaw resides in the Security component of version 11.2.26.0.000. An unauthenticated remote attacker can send crafted HTTP requests to trigger a hang or repeatable crash, resulting in a complete loss of availability. The vulnerability is classified under CWE-400: Uncontrolled Resource Consumption and requires no user interaction or privileges to exploit.

Critical Impact
Unauthenticated network attackers can cause a full denial of service against Oracle Hyperion Financial Management, disabling financial consolidation and reporting workflows.

Affected Products

Oracle Hyperion Financial Management 11.2.26.0.000
Oracle Hyperion (Security component)
Deployments exposing Hyperion HTTP interfaces to untrusted networks

Discovery Timeline

2026-09-15 - CVE-2026-87199 published to the National Vulnerability Database
2026-09-16 - Last updated in NVD database

Technical Details for CVE-2026-87199

Vulnerability Analysis

The vulnerability affects the Security component of Oracle Hyperion Financial Management 11.2.26.0.000. An attacker with only network access to the HTTP interface can trigger a condition that hangs or crashes the service. Because exploitation requires no authentication, no user interaction, and low attack complexity, any exposed Hyperion instance is reachable by anonymous attackers on the network. Successful exploitation halts financial consolidation, close, and reporting operations that depend on Hyperion Financial Management. According to Oracle's Security Alert CSPUSEP2026, the impact is limited to availability; confidentiality and integrity are not affected.

Root Cause

The issue maps to CWE-400: Uncontrolled Resource Consumption. A request processed by the Security component causes the application to consume or exhaust a bounded resource, leading to a hang or repeatable crash. Oracle has not publicly disclosed the specific code path. Consult the Oracle Security Alert CSPUSEP2026 for authoritative technical detail.

Attack Vector

Exploitation occurs over the network using standard HTTP requests to the Hyperion Financial Management endpoint. The attacker sends one or more crafted requests to the Security component. The service enters an unresponsive state or terminates, producing a complete denial of service. Repeated requests can maintain the outage. The EPSS score at publication is approximately 0.32% (25th percentile), indicating no observed exploitation activity to date.

No public proof-of-concept exploit code is available. Refer to the vendor advisory for validated technical detail.

Detection Methods for CVE-2026-87199

Indicators of Compromise

Unexpected termination or unresponsive state of the Hyperion Financial Management service process
Repeated HTTP requests to Hyperion Security component endpoints from unauthenticated or unusual source addresses
Application logs recording thread exhaustion, request timeouts, or worker crashes in the Security component
Sudden availability alerts from monitoring probes targeting Hyperion HTTP endpoints

Detection Strategies

Monitor HTTP request patterns to Hyperion endpoints for anomalous volumes or malformed requests from single sources
Correlate service restarts and crash dumps with inbound request telemetry to identify pre-crash payloads
Alert on Hyperion process exits with non-zero status or unexpected JVM heap dumps
Baseline normal request rates to the Security component and flag statistical outliers

Monitoring Recommendations

Enable availability monitoring against Hyperion Financial Management HTTP endpoints with sub-minute polling
Forward Hyperion application, web server, and OS-level logs to a centralized SIEM for correlation
Track service uptime, JVM thread counts, and CPU utilization on Hyperion hosts
Review web application firewall logs for repeated requests targeting Security component URIs

How to Mitigate CVE-2026-87199

Immediate Actions Required

Apply the security update referenced in Oracle Security Alert CSPUSEP2026 to affected Hyperion Financial Management 11.2.26.0.000 deployments
Restrict network access to Hyperion HTTP interfaces to authenticated corporate networks and VPN users only
Deploy rate limiting and request inspection in front of Hyperion using a reverse proxy or web application firewall
Verify backup and recovery procedures for Hyperion Financial Management to restore service quickly if attacked

Patch Information

Oracle addresses this vulnerability in the fixes documented in Oracle Security Alert CSPUSEP2026. Administrators running Oracle Hyperion Financial Management 11.2.26.0.000 should download the referenced patch bundle and apply it following Oracle's documented Hyperion patching procedure. Validate the patched deployment in a staging environment prior to production rollout.

Workarounds

Place Hyperion Financial Management behind a reverse proxy that enforces authentication before requests reach the Security component
Apply network segmentation and firewall rules that permit only known application clients to reach Hyperion HTTP ports
Implement WAF rules to throttle or block anomalous request patterns targeting Hyperion endpoints
Configure service supervision to automatically restart the Hyperion process on unexpected termination while patching is planned

bash

# Example: restrict Hyperion HTTP access to a trusted management subnet using iptables
iptables -A INPUT -p tcp --dport 19000 -s 10.10.20.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 19000 -j DROP

# Example: basic nginx rate limit in front of Hyperion
# limit_req_zone $binary_remote_addr zone=hyperion:10m rate=20r/s;
# location / {
#     limit_req zone=hyperion burst=40 nodelay;
#     proxy_pass http://hyperion_backend;
# }