CVE-2026-60739: Oracle Field Service Auth Bypass Flaw

CVE-2026-60739 Overview

CVE-2026-60739 affects the Internal Operations component of Oracle Field Service within Oracle E-Business Suite. Oracle disclosed the flaw in the July 2026 Critical Patch Update. The vulnerability allows a low-privileged attacker with network access over HTTP to compromise Oracle Field Service. Successful exploitation grants unauthorized access to critical data and permits unauthorized update, insert, or delete operations against a subset of Oracle Field Service data. Supported versions 12.2.3 through 12.2.15 are affected.

Critical Impact
An authenticated attacker over the network can read all Oracle Field Service accessible data and modify a subset of it without user interaction.

Affected Products

Oracle E-Business Suite — Oracle Field Service 12.2.3
Oracle E-Business Suite — Oracle Field Service versions 12.2.4 through 12.2.14
Oracle E-Business Suite — Oracle Field Service 12.2.15

Discovery Timeline

2026-07-21 - CVE-2026-60739 published to NVD
2026-07-21 - Last updated in NVD database
July 2026 - Oracle addressed the issue in the Oracle Critical Patch Update Advisory - July 2026

Technical Details for CVE-2026-60739

Vulnerability Analysis

The flaw resides in the Internal Operations component of Oracle Field Service, a module of Oracle E-Business Suite. An attacker holding valid low-privileged credentials can reach the affected functionality over HTTP without user interaction. Exploitation returns unauthorized access to data classified as critical within the application's authorization model. The attacker can also perform limited modifications, covering insert, update, or delete operations on a subset of Oracle Field Service records. Availability of the service is not impacted. Oracle rates the issue as easily exploitable, indicating that no specialized conditions or timing constraints are required to trigger the flaw.

Root Cause

Oracle's advisory does not publish a Common Weakness Enumeration (CWE) identifier or source-level detail for CVE-2026-60739. Given the network attack vector, low-privilege requirement, and combined confidentiality and integrity impacts, the defect is consistent with a broken access control or authorization check within the Internal Operations component. The affected code paths appear to serve authenticated sessions without enforcing sufficient row-level or function-level authorization on data accessed through Field Service internal operations endpoints.

Attack Vector

The attack vector is remote over HTTP against the Oracle E-Business Suite web tier that serves Oracle Field Service. The attacker must authenticate as a low-privileged user. No user interaction and no elevated privileges are required. Once authenticated, the attacker issues crafted HTTP requests to the Internal Operations component and receives data or triggers modifications that should have been gated by authorization checks. See the Oracle Security Alert: July 2026 for the vendor's technical details.

Detection Methods for CVE-2026-60739

Indicators of Compromise

Unexpected HTTP requests from low-privileged user sessions to Oracle Field Service Internal Operations URLs on the E-Business Suite web tier.
Database audit records showing SELECT, INSERT, UPDATE, or DELETE operations issued by application accounts against Field Service tables outside their normal role scope.
Anomalous volumes of successful HTTP 200 responses returning large data payloads to non-administrative Field Service accounts.

Detection Strategies

Enable Oracle E-Business Suite Sign-On Audit and Page Access Tracking to record which users access Field Service Internal Operations pages.
Correlate application-tier access logs with database audit trails to detect authorized sessions performing operations inconsistent with their assigned responsibilities.
Baseline normal Field Service request patterns per user role and alert on statistical deviations in endpoint access or record volume retrieved.

Monitoring Recommendations

Forward Oracle HTTP Server (access_log) and FND audit tables to a central log platform for retention and alerting.
Monitor changes to Field Service data tables by non-service accounts and flag any DML executed by end-user sessions.
Track authentication events for Field Service accounts and alert on new or rarely used low-privileged accounts issuing Internal Operations requests.

How to Mitigate CVE-2026-60739

Immediate Actions Required

Apply the July 2026 Oracle Critical Patch Update for Oracle E-Business Suite 12.2 to all affected environments.
Inventory all Oracle Field Service deployments running versions 12.2.3 through 12.2.15 and prioritize internet-facing instances.
Rotate credentials for low-privileged Field Service accounts, particularly those accessible from external networks.
Review Field Service role assignments and revoke unnecessary access to Internal Operations functions.

Patch Information

Oracle released fixes as part of the July 2026 Critical Patch Update. Administrators should follow the patch matrix and prerequisite guidance published in the Oracle Critical Patch Update Advisory - July 2026. Oracle recommends applying Critical Patch Update fixes without delay, as unpatched systems remain exposed to disclosed vulnerabilities.

Workarounds

Restrict network access to the Oracle E-Business Suite web tier using a reverse proxy or web application firewall until the patch is applied.
Disable or restrict access to Field Service Internal Operations functions for user roles that do not require them.
Enforce IP allow-listing for Field Service administrative and internal operations URLs.

bash

# Example: restrict access to Field Service Internal Operations paths at the reverse proxy
location ~* ^/OA_HTML/.*FieldService.*InternalOps.* {
    allow 10.10.0.0/16;
    deny  all;
    proxy_pass http://ebs-web-tier;
}