CVE-2026-46934: Oracle Complex Maintenance RCE Vulnerability

CVE-2026-46934 Overview

CVE-2026-46934 affects the Oracle Complex Maintenance, Repair and Overhaul product within Oracle E-Business Suite. The flaw resides in the Internal Operations component and impacts supported versions 12.2.3 through 12.2.15. A low-privileged attacker with network access over HTTP can exploit the issue, although successful exploitation is rated as difficult by Oracle. Successful attacks can result in full takeover of the Oracle Complex Maintenance, Repair and Overhaul application. The vulnerability is categorized under [CWE-269: Improper Privilege Management].

Critical Impact
Successful exploitation leads to full compromise of Oracle Complex Maintenance, Repair and Overhaul, affecting confidentiality, integrity, and availability of the application and its data.

Affected Products

Oracle E-Business Suite - Complex Maintenance, Repair and Overhaul version 12.2.3
Oracle E-Business Suite - Complex Maintenance, Repair and Overhaul versions 12.2.4 through 12.2.14
Oracle E-Business Suite - Complex Maintenance, Repair and Overhaul version 12.2.15

Discovery Timeline

2026-06-17 - CVE-2026-46934 published to NVD
2026-06-18 - Last updated in NVD database
2026-06 - Addressed in the Oracle Security Alert

Technical Details for CVE-2026-46934

Vulnerability Analysis

The vulnerability is in the Internal Operations component of Oracle Complex Maintenance, Repair and Overhaul, a module of the Oracle E-Business Suite used for asset lifecycle management. An authenticated attacker with low privileges can interact with the affected component over HTTP. Successful exploitation grants the attacker control over the application, including the ability to read, modify, and destroy data managed by the module.

Oracle classifies exploitation as difficult, which suggests conditions outside the attacker's direct control must be met for the attack to succeed. The EPSS probability is 0.345%, placing the issue in the 26th percentile of likelihood of exploitation. No public proof-of-concept code is available at the time of publication, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog.

Root Cause

The weakness is mapped to [CWE-269: Improper Privilege Management]. The Internal Operations component permits a low-privileged authenticated user to perform actions reserved for higher-privileged users, leading to a takeover of the application. Oracle has not published implementation-level technical details beyond the advisory.

Attack Vector

An attacker requires network access via HTTP to the Oracle E-Business Suite instance and a valid low-privileged account. No user interaction is needed. Because the scope is unchanged, the impact is limited to the affected Oracle Complex Maintenance, Repair and Overhaul component, but within that scope the attacker can achieve full compromise.

No verified exploitation code is available. Refer to the Oracle Security Alert for vendor-supplied details.

Detection Methods for CVE-2026-46934

Indicators of Compromise

Unexpected administrative actions performed by low-privileged Oracle E-Business Suite accounts.
Anomalous HTTP requests targeting the Complex Maintenance, Repair and Overhaul Internal Operations endpoints.
Unauthorized changes to maintenance workflows, work orders, or asset records.
Privilege role assignments or grants performed outside of approved change windows.

Detection Strategies

Review Oracle E-Business Suite audit logs (FND_LOG_MESSAGES, sign-on audit tables) for low-privileged users invoking Internal Operations functions.
Correlate web-tier access logs with application-tier database activity to identify privilege boundary violations.
Baseline normal user behavior in the Complex Maintenance, Repair and Overhaul module and alert on deviations.

Monitoring Recommendations

Forward Oracle E-Business Suite application, web, and database logs to a centralized SIEM for retention and correlation.
Monitor authentication patterns and HTTP request volumes against /OA_HTML/ endpoints associated with the affected module.
Track changes to responsibilities, menus, and function grants tied to Complex Maintenance, Repair and Overhaul.

How to Mitigate CVE-2026-46934

Immediate Actions Required

Apply the patches referenced in the Oracle Critical Patch Update Security Alert - June 2026.
Inventory all Oracle E-Business Suite environments running versions 12.2.3 through 12.2.15 and prioritize internet-exposed instances.
Restrict network access to the Oracle E-Business Suite web tier to trusted networks where feasible.
Audit low-privileged user accounts and remove unnecessary access to the Complex Maintenance, Repair and Overhaul module.

Patch Information

Oracle has released fixes for CVE-2026-46934 as part of its security alert program. Administrators should consult the Oracle Security Alert for the specific patch identifiers applicable to their version of Oracle E-Business Suite 12.2.x and apply them following Oracle's documented patching procedures.

Workarounds

Place the Oracle E-Business Suite web tier behind a web application firewall and restrict access to Internal Operations URLs.
Disable or unassign the Complex Maintenance, Repair and Overhaul responsibility for users who do not require it until patches are applied.
Enforce multi-factor authentication for all Oracle E-Business Suite users to raise the cost of credential abuse against the prerequisite low-privileged account.

bash

# Example: identify users granted Complex Maintenance, Repair and Overhaul responsibilities
# Run as APPS user in SQL*Plus against the Oracle E-Business Suite database
SELECT fu.user_name, fr.responsibility_name
  FROM fnd_user fu,
       fnd_user_resp_groups furg,
       fnd_responsibility_tl fr
 WHERE fu.user_id = furg.user_id
   AND furg.responsibility_id = fr.responsibility_id
   AND fr.responsibility_name LIKE '%Complex Maintenance%'
   AND furg.end_date IS NULL;