CVE-2026-62526: Oracle Hyperion Auth Bypass Vulnerability

CVE-2026-62526 Overview

CVE-2026-62526 affects the Common Security component of Oracle Hyperion Infrastructure Technology, version 11.2.25.0.000. The flaw is categorized under [CWE-284] Improper Access Control. An authenticated attacker with high privileges can send crafted HTTP requests to modify accessible data or trigger a partial denial of service.

Oracle rates the issue at CVSS 3.1 Base Score 3.3, reflecting limited integrity and availability impact with no confidentiality exposure. Exploitation is difficult and requires existing high-privileged access to the target environment.

Critical Impact
Authenticated attackers can perform unauthorized update, insert, or delete operations against a subset of Hyperion data and cause a partial denial of service on the Infrastructure Technology component.

Affected Products

Oracle Hyperion Infrastructure Technology 11.2.25.0.000
Component: Common Security
Product family: Oracle Hyperion

Discovery Timeline

2026-08-18 - CVE-2026-62526 published to NVD
2026-08-20 - Last updated in NVD database
Oracle Security Alert - Published in the Oracle Security Alert Advisory

Technical Details for CVE-2026-62526

Vulnerability Analysis

The vulnerability resides in the Common Security component of Oracle Hyperion Infrastructure Technology. This component handles authentication, authorization, and session management functions shared across the Hyperion product stack. Improper access control in this layer permits a high-privileged authenticated user to reach functionality or data that should remain restricted.

Successful exploitation results in two outcomes. First, the attacker gains unauthorized write access to a subset of Hyperion data, enabling insert, update, or delete operations. Second, the attacker can degrade service availability, producing a partial denial of service against the Infrastructure Technology component. Confidentiality is not affected.

Oracle characterizes the exploit as difficult, indicating that specific conditions or timing beyond the attacker's control must align for the attack to succeed. Network access via HTTP is required.

Root Cause

The root cause is improper access control ([CWE-284]) within the Common Security component. Authorization checks do not adequately restrict actions available to high-privileged accounts, allowing operations outside their intended scope.

Attack Vector

The attack vector is network-based over HTTP. The attacker must already hold high-privileged credentials on the Hyperion Infrastructure Technology environment. No user interaction is required, and the scope remains unchanged. The vulnerability cannot be exploited by anonymous or low-privileged users. See the Oracle Security Alert for vendor-supplied technical detail.

Detection Methods for CVE-2026-62526

Indicators of Compromise

Unexpected insert, update, or delete operations originating from privileged Hyperion service accounts.
HTTP requests targeting Common Security endpoints from unusual source addresses or during off-hours.
Partial service degradation, timeouts, or component restarts within Hyperion Infrastructure Technology.

Detection Strategies

Review Hyperion application logs for anomalous administrative activity, particularly data modification actions performed by privileged accounts.
Correlate HTTP access logs against expected administrative workflows to identify out-of-pattern requests to Common Security endpoints.
Monitor Hyperion audit trails for changes to configuration or user permissions that do not map to authorized change tickets.

Monitoring Recommendations

Baseline normal privileged-user behavior on Hyperion systems and alert on deviations in data-modification frequency or volume.
Ingest Hyperion application and web-tier logs into a centralized log platform for retention and correlation.
Track availability metrics on the Hyperion Infrastructure Technology tier to detect partial denial-of-service conditions.

How to Mitigate CVE-2026-62526

Immediate Actions Required

Apply the Oracle Critical Patch Update referenced in the Oracle Security Alert for August 2026.
Inventory Oracle Hyperion Infrastructure Technology deployments to confirm exposure to version 11.2.25.0.000.
Audit accounts with high privileges on Hyperion and remove or downgrade unnecessary access.

Patch Information

Oracle addresses this issue through its August 2026 Critical Patch Update. Administrators should follow the vendor advisory at the Oracle Security Alert to obtain the patch bundle applicable to Oracle Hyperion Infrastructure Technology 11.2.25.0.000 and apply it in a change-controlled maintenance window.

Workarounds

Restrict network access to the Hyperion Infrastructure Technology HTTP interfaces to trusted administrative networks only.
Enforce multi-factor authentication for all privileged Hyperion accounts to raise the barrier for credential misuse.
Rotate credentials for high-privileged Hyperion service and administrator accounts if compromise is suspected.

bash

# Configuration example: restrict Hyperion HTTP endpoints to trusted admin subnet
# (Adapt to your reverse proxy or firewall syntax)
iptables -A INPUT -p tcp --dport 19000 -s 10.10.20.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 19000 -j DROP