CVE-2026-87420

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Oracle Service Bus Remote Code Execution

Publication date: 2026-10-20

Last updated on: 2026-10-21

Assigner: Oracle

Description

Vulnerability in the Oracle Service Bus product of Oracle Fusion Middleware (component: Core). The supported version that is affected is 14.1.2.0.0. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle Service Bus. Successful attacks of this vulnerability can result in takeover of Oracle Service Bus. CVSS 3.1 Base Score 8.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-10-20

Last Modified

2026-10-21

Generated

2026-11-10

AI Q&A

2026-10-21

EPSS Evaluated

2026-11-08

NVD

CVE-2026-87420

EUVD

EUVD-2026-106459

Affected Vendors & Products

Vendor	Product	Version / Range
Oracle Corporation	Oracle Service Bus	14.1.2.0.0

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-284	The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.

Attack-Flow Graph

Executive Summary

This is a vulnerability in Oracle Service Bus 14.1.2.0.0 where a low-privileged attacker with network access via HTTP can exploit it to take over the system. The attack impacts confidentiality, integrity, and availability with a CVSS score of 8.8.

Detection Guidance

Detection of CVE-2026-87420 requires monitoring Oracle Service Bus for unusual activity or unauthorized access attempts. Check logs for HTTP requests targeting the Oracle Service Bus component. Ensure the system is running the latest patched version of Oracle Service Bus 14.1.2.0.0.

Impact Analysis

An attacker could gain full control of the Oracle Service Bus, leading to unauthorized access, data breaches, or disruption of services. This could affect sensitive data handling and system operations.

Compliance Impact

This vulnerability allows unauthorized takeover of Oracle Service Bus, which could lead to unauthorized access or modification of sensitive data. Such breaches may violate compliance requirements under GDPR (data protection) and HIPAA (health information security) by exposing confidential information or disrupting data integrity.

Mitigation Strategies

Apply the latest security patches from Oracle for Oracle Service Bus version 14.1.2.0.0. Restrict network access to HTTP ports used by Oracle Service Bus. Implement strong authentication and authorization controls for low-privileged users.

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EPSS Chart

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