---
id: CVE-2026-87398
title: >-
  Vulnerability in the Oracle Outside In Technology product of Oracle Fusion
  Middleware (component: Outside In Core)
summary: >-
  Vulnerability in the Oracle Outside In Technology product of Oracle Fusion
  Middleware (component: Outside In Core).   The supported version that is
  affected is 8.5.8. Easily exploitable vulnerability allows unauthenticated
  attacker with …
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cvssSource: cna
vendor: Oracle Corporation
product: Oracle Outside In Technology
affected:
  - oracle_outside_in_technology 8.5.8
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-10-22T18:41:50.986851Z'
published: '2026-10-20'
updated: '2026-10-22'
sourceUpdated: '2026-10-22T18:50:22.009Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-87398'
references:
  - url: 'https://www.oracle.com/security-alerts/cpuoct2026.html'
    label: Oracle Advisory
tags:
  - cve.org
epss: 0.0049
epssPercentile: 0.41958
ingestedAt: '2026-10-20T22:23:33.841Z'
---

## Overview

Vulnerability in the Oracle Outside In Technology product of Oracle Fusion Middleware (component: Outside In Core).   The supported version that is affected is 8.5.8. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Oracle Outside In Technology.  Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Oracle Outside In Technology. CVSS 3.1 Base Score 7.5 (Availability impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

## Affected

- `oracle_outside_in_technology 8.5.8`

## Remediation

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