CVE-2026-62533: Oracle Hyperion Information Disclosure Flaw

CVE-2026-62533 Overview

CVE-2026-62533 affects the Oracle Hyperion Calculation Manager component of Oracle Hyperion. The vulnerability resides in the Security component of supported version 11.2.25.0.000. An unauthenticated attacker with network access via HTTP can exploit this issue, though successful exploitation is described as difficult. Successful attacks result in unauthorized read access to a subset of Oracle Hyperion Calculation Manager accessible data. The vulnerability impacts confidentiality only, with no effect on integrity or availability.

Critical Impact
Unauthenticated remote attackers may obtain limited read access to Oracle Hyperion Calculation Manager data over HTTP under specific, difficult-to-achieve conditions.

Affected Products

Oracle Hyperion Calculation Manager 11.2.25.0.000
Oracle Hyperion (Security component)
Deployments exposing Hyperion Calculation Manager over HTTP

Discovery Timeline

2026-08-18 - CVE-2026-62533 published to NVD
2026-08-20 - Last updated in NVD database

Technical Details for CVE-2026-62533

Vulnerability Analysis

CVE-2026-62533 is an information disclosure vulnerability in the Security component of Oracle Hyperion Calculation Manager. The flaw allows an unauthenticated attacker who can reach the application over HTTP to read a limited subset of application data. Oracle characterizes the attack complexity as high, meaning exploitation depends on conditions outside the attacker's direct control. The scope of exposed data is bounded to information accessible to Calculation Manager, and no write or destructive impact is described. The Oracle Critical Patch Update advisory is the authoritative source for affected component details (Oracle Security Alert).

Root Cause

The root cause resides in the Security component of Oracle Hyperion Calculation Manager. Oracle has not published implementation-level detail publicly. The behavior is consistent with an information exposure weakness where server responses or handled data leak content that should require authentication. Because the confidentiality impact is rated Low, the exposed subset is limited rather than comprehensive.

Attack Vector

The attack vector is network-based over HTTP with no authentication and no user interaction required. Exploitation requires overcoming difficult preconditions, which reduces practical risk. An attacker must reach the Hyperion Calculation Manager HTTP endpoints directly or through an accessible intermediary. The EPSS score is 0.258% at the 17.676 percentile as of 2026-08-20, indicating a low current probability of observed exploitation.

No verified proof-of-concept code has been published. Refer to the Oracle Critical Patch Update advisory for authoritative technical guidance and fixed versions.

Detection Methods for CVE-2026-62533

Indicators of Compromise

Unauthenticated HTTP requests targeting Hyperion Calculation Manager endpoints from unexpected external sources.
Anomalous response sizes or repeated 200-status responses to unauthenticated probes of Calculation Manager URIs.
Access patterns that iterate through Calculation Manager resource identifiers without a valid session.

Detection Strategies

Inspect web server and reverse proxy logs for unauthenticated requests to Hyperion Calculation Manager paths.
Alert on HTTP request bursts to Calculation Manager endpoints originating from a single client without prior authentication events.
Correlate access logs with authentication logs to surface data reads without a preceding successful login.

Monitoring Recommendations

Enable verbose access logging on the Hyperion HTTP tier and forward logs to a centralized analytics platform.
Baseline normal Calculation Manager request rates and alert on statistical deviations.
Track outbound data volumes from Hyperion hosts to detect bulk reads of exposed content.

How to Mitigate CVE-2026-62533

Immediate Actions Required

Apply the fixes referenced in the Oracle Critical Patch Update for August 2026 as soon as testing permits.
Restrict network reachability of Hyperion Calculation Manager HTTP endpoints to trusted management networks.
Inventory all Hyperion 11.2.25.0.000 deployments and confirm patch status.

Patch Information

Oracle addresses this issue in the August 2026 Critical Patch Update. Administrators should follow the vendor advisory to identify the correct patch bundle for their environment. See the Oracle Security Alert for component-specific fix details.

Workarounds

Place Hyperion Calculation Manager behind an authenticating reverse proxy or VPN gateway until patches are applied.
Enforce IP allowlists on the web tier to block unauthenticated access from untrusted networks.
Disable or firewall off Calculation Manager endpoints that are not required for business operations.

bash

# Example: restrict Hyperion Calculation Manager access at the web tier
# Apache HTTP Server example
<Location "/aps/">
    Require ip 10.0.0.0/8
    Require ip 192.168.0.0/16
</Location>