CVE-2026-62529: Oracle Hyperion Auth Bypass Vulnerability

CVE-2026-62529 Overview

CVE-2026-62529 is a vulnerability in the Oracle Hyperion Calculation Manager product of Oracle Hyperion, within the Security component. The supported version affected is 11.2.25.0.000. The flaw allows a low-privileged attacker with network access via HTTP to compromise Oracle Hyperion Calculation Manager. Successful exploitation requires human interaction from a person other than the attacker. Exploitation can result in unauthorized update, insert, or delete access to some Oracle Hyperion Calculation Manager accessible data.

Critical Impact
A low-privileged, network-based attacker can achieve unauthorized modification of a subset of Oracle Hyperion Calculation Manager data when a legitimate user is tricked into interacting with attacker-controlled content.

Affected Products

Oracle Hyperion Calculation Manager 11.2.25.0.000
Oracle Hyperion (Security component)

Discovery Timeline

2026-08-18 - CVE CVE-2026-62529 published to NVD
2026-08-20 - Last updated in NVD database

Technical Details for CVE-2026-62529

Vulnerability Analysis

The vulnerability resides in the Security component of Oracle Hyperion Calculation Manager. An authenticated attacker with low privileges can send crafted HTTP requests to the application. Exploitation requires a separate authenticated user to interact with attacker-controlled content, indicating a client-assisted attack pattern such as cross-site request forgery or a similar user-interaction-driven flaw. The impact is limited to integrity: attackers can insert, update, or delete a subset of data accessible to Calculation Manager. Confidentiality and availability are not affected according to the published CVSS vector.

Root Cause

The advisory attributes the flaw to the Security component of Oracle Hyperion Calculation Manager. Oracle has not published root-cause details beyond the security alert. The requirement for user interaction combined with low attacker privileges is consistent with insufficient request validation or missing anti-forgery controls in an authenticated HTTP interface.

Attack Vector

The attack vector is network-based over HTTP. An attacker holding a low-privileged account crafts a malicious request or content that a second authenticated user triggers. Once the victim interacts with the payload, the application performs unauthorized write operations under the victim's session context. Refer to the Oracle Security Alert for vendor guidance and patch mapping.

Detection Methods for CVE-2026-62529

Indicators of Compromise

Unexpected create, update, or delete operations against Oracle Hyperion Calculation Manager objects performed by legitimate user sessions.
HTTP requests to Calculation Manager endpoints originating from external referrers or embedded in unexpected pages.
Audit-log entries showing data modifications outside normal business workflows or scheduled jobs.

Detection Strategies

Enable and centrally collect Oracle Hyperion Calculation Manager application and web server logs for correlation.
Alert on write operations initiated by low-privileged accounts that fall outside their expected role usage.
Correlate HTTP Referer and Origin header anomalies with authenticated write actions to Calculation Manager URLs.

Monitoring Recommendations

Baseline normal Calculation Manager write activity per user role and alert on statistical deviations.
Monitor for repeated failed authentication followed by successful low-privilege sessions performing writes.
Forward web application firewall and reverse proxy logs to a SIEM for retention and correlation.

How to Mitigate CVE-2026-62529

Immediate Actions Required

Apply the fixes referenced in the Oracle Security Alert for August 2026 to Oracle Hyperion Calculation Manager 11.2.25.0.000.
Restrict network access to Calculation Manager HTTP endpoints to trusted administrative networks.
Review Calculation Manager audit logs for unauthorized insert, update, or delete activity since deployment.

Patch Information

Oracle addresses this issue through the Critical Patch Update / Security Alert program. Consult the Oracle Security Alert for the applicable patch and installation instructions for version 11.2.25.0.000.

Workarounds

Enforce least-privilege role assignments so that low-privileged accounts cannot access sensitive Calculation Manager objects.
Require users to log out of Hyperion sessions before browsing untrusted content, reducing the window for user-interaction-driven exploitation.
Deploy a web application firewall rule that validates Origin and Referer headers on Calculation Manager state-changing requests.

bash

# Configuration example
# Refer to the Oracle Security Alert (cspuaug2026) for patch application steps.
# General approach: stage the update, apply the vendor-supplied patch, and validate.