CVE-2026-87126: Oracle Report Manager Auth Bypass Flaw

CVE-2026-87126 Overview

CVE-2026-87126 affects the Oracle Report Manager component of Oracle E-Business Suite. The flaw resides in the Reports Security subsystem and impacts supported versions 12.2.3 through 12.2.15. A low-privileged attacker with network access over HTTP can exploit this vulnerability to compromise Oracle Report Manager. Successful exploitation grants unauthorized access to all data accessible through Report Manager and enables a partial denial of service condition against the component.

Critical Impact
Authenticated network attackers can exfiltrate sensitive report data and disrupt reporting services across Oracle E-Business Suite deployments running affected versions.

Affected Products

Oracle E-Business Suite 12.2.3 through 12.2.15
Oracle Report Manager component
Reports Security subsystem

Discovery Timeline

2026-09-15 - CVE-2026-87126 published to NVD
2026-09-16 - Last updated in NVD database

Technical Details for CVE-2026-87126

Vulnerability Analysis

The vulnerability exists in the Reports Security component of Oracle Report Manager. The flaw allows a low-privileged authenticated user to bypass access controls enforced by Report Manager over HTTP. Once exploited, the attacker gains high-impact read access to all data accessible to Report Manager and can cause partial service disruption. The impact profile emphasizes confidentiality loss combined with limited availability degradation, while data integrity remains unaffected.

Oracle categorizes this issue under Reports Security, indicating a break in the authorization boundary that separates report consumers from privileged report data. Because Report Manager stores and distributes financial, operational, and audit-relevant reports, unauthorized retrieval extends beyond individual documents to bulk data access.

Root Cause

Oracle has not published detailed root-cause information. The advisory language indicates a broken access control condition in the Reports Security layer that fails to properly enforce authorization checks on requests submitted by authenticated low-privileged accounts.

Attack Vector

Exploitation requires network access to the Oracle E-Business Suite HTTP interface and a valid account with low privileges. No user interaction is required. The attacker submits crafted HTTP requests to Report Manager endpoints to retrieve data or trigger conditions that degrade service. Refer to the Oracle Security Alert: CSPUSEP2026 for vendor-specific technical guidance.

No public proof-of-concept code or exploit has been published for this CVE at the time of writing.

Detection Methods for CVE-2026-87126

Indicators of Compromise

Unexpected HTTP requests to Oracle Report Manager endpoints from accounts that do not typically access reporting functions.
Elevated volumes of report downloads or metadata queries originating from a single low-privileged session.
Application server errors or timeouts in Report Manager logs coinciding with abnormal request patterns.

Detection Strategies

Correlate Oracle E-Business Suite application logs with authentication logs to identify low-privileged accounts issuing atypical Report Manager requests.
Baseline normal Report Manager access patterns per user role and alert on deviations that suggest bulk data enumeration.
Inspect HTTP access logs for requests to Report Manager URIs containing suspicious parameter manipulation.

Monitoring Recommendations

Forward Oracle E-Business Suite HTTP server logs, application logs, and audit tables to a centralized analytics platform for continuous review.
Monitor for repeated 5xx responses from Report Manager endpoints that may indicate partial denial-of-service attempts.
Track privilege distribution and session activity for accounts with access to Oracle Report Manager.

How to Mitigate CVE-2026-87126

Immediate Actions Required

Apply the Oracle Critical Patch Update referenced in the Oracle Security Alert: CSPUSEP2026 as soon as change windows permit.
Inventory all Oracle E-Business Suite instances running versions 12.2.3 through 12.2.15 and prioritize internet-exposed systems.
Review Report Manager access logs for signs of exploitation before and after patching.

Patch Information

Oracle has released a security fix as part of its Critical Patch Update program. Administrators should consult the Oracle Security Alert: CSPUSEP2026 for the specific patch identifiers and deployment instructions aligned to each affected release of Oracle E-Business Suite 12.2.x.

Workarounds

Restrict network access to the Oracle E-Business Suite HTTP interface using firewall rules or a reverse proxy that limits Report Manager exposure to trusted networks.
Enforce least-privilege role assignments and remove Report Manager access from accounts that do not require it.
Enable enhanced auditing on Report Manager endpoints to detect anomalous access while patching is scheduled.

bash

# Configuration example: restrict Report Manager access at the reverse proxy
# Apache HTTP Server example limiting Report Manager URIs to trusted subnets
<Location /OA_HTML/RM>
    Require ip 10.0.0.0/8
    Require ip 192.168.0.0/16
</Location>