CVE-2026-70911: Oracle Hyperion Financial Management Flaw

CVE-2026-70911 Overview

CVE-2026-70911 is an information disclosure vulnerability in the Security component of Oracle Hyperion Financial Management. The affected version is 11.2.25.0.000. An unauthenticated attacker with network access via HTTP can exploit this weakness to gain unauthorized read access to a subset of Oracle Hyperion Financial Management data. The flaw is classified under CWE-200: Exposure of Sensitive Information to an Unauthorized Actor. Oracle disclosed the issue in its August 2026 Critical Patch Update advisory.

Critical Impact
Unauthenticated remote attackers can read a subset of confidential financial data over HTTP without user interaction.

Affected Products

Oracle Hyperion Financial Management 11.2.25.0.000
Oracle Hyperion (Security component)
Deployments exposing Hyperion Financial Management over HTTP to untrusted networks

Discovery Timeline

2026-08-18 - CVE-2026-70911 published to the National Vulnerability Database (NVD)
2026-08-22 - Last updated in NVD database

Technical Details for CVE-2026-70911

Vulnerability Analysis

The vulnerability resides in the Security component of Oracle Hyperion Financial Management. It permits an unauthenticated remote attacker to retrieve confidential data through crafted HTTP requests. Exploitation does not require credentials, elevated privileges, or user interaction. Successful attacks compromise confidentiality only; the flaw does not modify data or disrupt availability. Impact is bounded to a subset of Hyperion Financial Management accessible data rather than the entire dataset.

Root Cause

The root cause maps to [CWE-200], where the application exposes sensitive information to actors that are not explicitly authorized to view it. Access control checks in the Security component do not sufficiently constrain what data an anonymous HTTP requester can retrieve. Oracle's advisory does not publish the specific handler or endpoint at fault.

Attack Vector

The attack vector is network-based over HTTP. An attacker sends crafted requests directly to an exposed Oracle Hyperion Financial Management instance and receives responses containing restricted data. Because the vulnerability is unauthenticated and the attack complexity is low, Hyperion deployments reachable from untrusted networks are the primary exposure point. The Exploit Prediction Scoring System (EPSS) currently rates this issue at 0.316% (24.451 percentile) as of 2026-08-23, and no public proof-of-concept exploit has been observed.

No verified exploit code is publicly available. Refer to the Oracle Security Alert August 2026 for vendor technical details.

Detection Methods for CVE-2026-70911

Indicators of Compromise

Unauthenticated HTTP requests to Oracle Hyperion Financial Management endpoints from external or unexpected internal source IPs
HTTP responses containing Hyperion financial data returned to sessions without valid authentication tokens
Anomalous spikes in request volume against Hyperion Security component URIs

Detection Strategies

Inspect Hyperion web server and reverse proxy logs for HTTP requests that succeed without a corresponding authenticated session
Baseline normal Hyperion request patterns and alert on deviations in URI paths, user agents, or geolocation
Correlate WAF telemetry with Hyperion application logs to identify enumeration and reconnaissance behavior

Monitoring Recommendations

Enable verbose access logging on all Hyperion Financial Management application and web tiers
Forward Hyperion logs to a central SIEM and retain them for at least 90 days for retrospective analysis
Monitor egress traffic from Hyperion servers for unexpected data transfers to external endpoints

How to Mitigate CVE-2026-70911

Immediate Actions Required

Apply the fixes from the Oracle Security Alert August 2026 to Oracle Hyperion Financial Management 11.2.25.0.000
Restrict network access to Hyperion Financial Management to authenticated corporate networks and VPN clients
Audit Hyperion logs for prior unauthenticated requests that returned data

Patch Information

Oracle addressed CVE-2026-70911 in its August 2026 Critical Patch Update. Administrators should review the Oracle Security Alert August 2026 for the exact patch identifiers and installation procedures for Oracle Hyperion Financial Management 11.2.25.0.000.

Workarounds

Place Hyperion Financial Management behind a reverse proxy or web application firewall that enforces authentication before requests reach the application
Block direct Internet exposure of Hyperion HTTP endpoints via network segmentation and firewall rules
Restrict access to the Security component URIs to trusted administrative subnets until patches are applied

bash

# Example firewall rule limiting Hyperion HTTP access to a trusted subnet
iptables -A INPUT -p tcp --dport 443 -s 10.0.0.0/8 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP