CVE-2026-62441: Oracle Hyperion Auth Bypass Vulnerability

CVE-2026-62441 Overview

CVE-2026-62441 is a security vulnerability in the Oracle Hyperion Calculation Manager product of Oracle Hyperion, specifically within the Security component. The affected version is 11.2.25.0.000. An authenticated attacker with low privileges and network access over HTTP can exploit this flaw to compromise Oracle Hyperion Calculation Manager. Successful exploitation grants unauthorized update, insert, or delete access to a portion of accessible data, along with unauthorized read access to a subset of data. The vulnerability affects both confidentiality and integrity of the application.

Critical Impact
Low-privileged attackers with network access can perform unauthorized read and write operations against Oracle Hyperion Calculation Manager data.

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-2026-62441 published to NVD
2026-08-20 - Last updated in NVD database

Technical Details for CVE-2026-62441

Vulnerability Analysis

The flaw resides in the Security component of Oracle Hyperion Calculation Manager. According to the Oracle advisory, the vulnerability is easily exploitable by an attacker who already holds a low-privileged account on the target instance. Once authenticated, the attacker can reach the vulnerable functionality over HTTP without any user interaction. The impact scope covers a subset of accessible data, allowing both read operations and modification actions such as insert, update, or delete. Availability is not impacted, but the combination of confidentiality and integrity loss creates a broken access control condition within the application.

Root Cause

Oracle has not published a detailed technical breakdown of the underlying defect. The advisory categorizes the issue under the Security component, which indicates a failure in enforcing proper access controls or authorization checks for authenticated sessions. Low-privileged users can invoke functionality intended for higher-privileged roles, producing a horizontal or vertical privilege escalation effect on data operations. Consult the Oracle Security Alert for the authoritative fix reference.

Attack Vector

The attack path requires network access to the Hyperion Calculation Manager HTTP interface and a valid low-privileged credential. The attacker sends crafted HTTP requests to endpoints that fail to properly validate authorization. No user interaction is required, and the attack complexity is low. Because the scope is unchanged, the impact stays confined to Hyperion Calculation Manager itself, but any data managed by the application may be read or altered.

No public proof-of-concept exploit code has been released. The EPSS score is 0.251% at the 16.799 percentile as of 2026-08-20, indicating a low near-term probability of observed exploitation.

Detection Methods for CVE-2026-62441

Indicators of Compromise

Unexpected INSERT, UPDATE, or DELETE operations on Hyperion Calculation Manager objects performed by non-administrative accounts.
HTTP requests from low-privileged users targeting administrative or restricted Calculation Manager endpoints.
Anomalous access patterns from accounts that historically only performed read operations.

Detection Strategies

Enable application-level audit logging in Oracle Hyperion and review authorization decisions for the Calculation Manager Security component.
Correlate authenticated HTTP requests with role assignments to surface actions that exceed a user's granted privileges.
Baseline normal activity per role and alert on deviations, particularly write operations issued by read-only or analyst accounts.

Monitoring Recommendations

Forward Hyperion access, audit, and web server logs to a centralized SIEM for retention and correlation.
Monitor authentication events for low-privileged accounts that suddenly begin issuing write requests.
Track configuration and data changes in Calculation Manager and require ticket-linked justification for administrative activity.

How to Mitigate CVE-2026-62441

Immediate Actions Required

Apply the fixes published in the Oracle Security Alert to all Hyperion Calculation Manager 11.2.25.0.000 deployments.
Inventory accounts with access to Hyperion Calculation Manager and remove unnecessary privileges.
Restrict network reachability of the Calculation Manager HTTP endpoints to trusted management segments.

Patch Information

Oracle addresses this vulnerability in the August 2026 Critical Patch Update cycle. Refer to the Oracle Security Alert for the corresponding patch identifiers, applicability matrix, and installation prerequisites. Apply the vendor patch during the next scheduled maintenance window and validate on non-production systems before production rollout.

Workarounds

Reduce the attack surface by placing Hyperion Calculation Manager behind a VPN or reverse proxy that enforces additional authentication.
Enforce least privilege on all Hyperion roles and disable inactive or shared low-privileged accounts.
Enable and review Hyperion audit trails to detect misuse until the patch is applied.

bash

# Verify installed Oracle Hyperion Calculation Manager version before and after patching
# Consult the Oracle Security Alert for patch identifiers applicable to 11.2.25.0.000
# https://www.oracle.com/security-alerts/cspuaug2026.html