External risk intelligence

Oracle Mobile Field Service Vulnerability Allows Unauthorized Data Access and Denial of Service

CVE advisorySeverity: CRITICAL (CVSS 9.1)

CVE-2026-101634

The vulnerability affects Oracle Mobile Field Service, a component of Oracle E-Business Suite. While the vulnerability is reachable over the network via HTTP, this product is typically deployed within internal enterprise environments to support business operations rather than as a public-facing internet service. Therefore, while network reachability is possible, public internet exposure is not the standard deployment pattern.

Halo Surface Signal: 3 out of 5 — possibly public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

A vulnerability has been identified in Oracle Mobile Field Service, part of Oracle E-Business Suite, which could allow an attacker to access sensitive data or disrupt service. This issue is rated as critical due to its potential impact on data confidentiality and system availability.

Unauthenticated attackers can exploit this to steal data or crash the service.
Critical risk of unauthorized access and service disruption.
Confirm relevance and exposure within our Oracle E-Business Suite environment.

Attack Path

How an attacker could exploit the issue

An unauthenticated attacker with network access can target the Internal Operations component of Oracle Mobile Field Service. This vulnerability allows for unauthorized access to sensitive data and can lead to a denial-of-service condition, causing frequent crashes of the application.

Requires network access.
Exploits the Internal Operations component.
Leads to data exposure and denial of service.

Live Threat

Current exploitation, exposure, and threat context

An unauthenticated attacker with network access could exploit this vulnerability to gain unauthorized access to critical data within Oracle Mobile Field Service, or to all accessible data. This could also lead to a complete denial of service by causing frequent crashes.

Critical and all accessible data.
Network access via HTTP.
Data exposure or service denial.

Operational Fix

Recommended remediation, mitigation, and detection steps

This vulnerability in Oracle Mobile Field Service, part of Oracle E-Business Suite, requires immediate attention from application owners and infrastructure teams. The first step is to locate all instances of the affected product, assess their network exposure and business criticality, and identify the accountable system owners to plan a risk-based remediation strategy.

Application and infrastructure teams own this.
Verify product instances and exposure.
Plan remediation based on identified risk.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

Halo Threat Intelligence helps prioritize remediation with Halo Surface Signal and H/A/L/O context. Start exposure validation with a free external attack surface trial.

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Frequently asked questions

What is Oracle Mobile Field Service?

It is a specialized module within the Oracle E-Business Suite designed to manage field-based operations, such as technician scheduling and service task tracking. Organizations use it to coordinate workflows between back-office systems and mobile personnel, making it a critical component for maintaining field service efficiency and operational data management.

What does this CVE-2026-101634 vulnerability actually do?

This vulnerability represents a significant security flaw that allows unauthorized parties to bypass authentication. Once inside, an attacker can access sensitive information processed by the system or intentionally crash the application, resulting in a denial-of-service condition that prevents legitimate users from performing their work.

How is this vulnerability triggered?

An attacker triggers this flaw by sending specifically crafted HTTP requests over the network to the Internal Operations component of the service. It does not require any prior user authentication or interaction; however, the vulnerability cannot be triggered unless the attacker has network connectivity to the specific service instance.

Is my Oracle Mobile Field Service instance at risk?

According to Halo Surface Signal, this software is typically deployed within protected internal enterprise environments rather than being exposed directly to the public internet. While the vulnerability is reachable over a network via HTTP, your actual risk depends on whether your specific deployment has network paths accessible to untrusted or external actors.

What should I do if I use this software?

You should immediately identify all active instances of the affected product within your environment. Once identified, evaluate the network accessibility of these instances to confirm if they are reachable from unauthorized segments and consult official Oracle security documentation to plan for necessary patches or security updates.

References

www.oracle.com/security-alerts/cpuoct2026.html

Written by Nicholas Merritt

Nicholas Merritt is VP of Security Solutions at Halo Security. With more than 25 years across application security, vulnerability prioritization, and offensive security, he helps teams translate threat data into practical exposure validation and remediation focus. He authors Halo Threat Intelligence CVE advisories using Halo Surface Signal and H/A/L/O context to prioritize internet-facing risk.