---
id: CVE-2026-87420
title: >-
  Vulnerability in the Oracle Service Bus product of Oracle Fusion Middleware
  (component: Core)
summary: >-
  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 vi…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
vendor: Oracle Corporation
product: Oracle Service Bus
affected:
  - oracle_service_bus 14.1.2.0.0
published: '2026-10-20'
updated: '2026-10-20'
sourceUpdated: '2026-10-20T21:24:37.125Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-87420'
references:
  - url: 'https://www.oracle.com/security-alerts/cpuoct2026.html'
    label: Oracle Advisory
tags:
  - cve.org
ingestedAt: '2026-10-20T22:23:33.835Z'
---

## Overview

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).

## Affected

- `oracle_service_bus 14.1.2.0.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.