---
id: CVE-2026-87293
title: 'Vulnerability in Oracle Java SE (component: RMI)'
summary: >-
  Vulnerability in Oracle Java SE (component: RMI).  Supported versions that are
  affected are Oracle Java SE: 8u503 and  8u503-perf; Oracle GraalVM Enterprise
  Edition: 21.3.19.1.1. Difficult to exploit vulnerability allows
  unauthenticated …
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N'
cvssSource: cna
vendor: Oracle Corporation
product: Oracle Java SE
affected:
  - oracle_java_se 8u503
  - oracle_java_se 8u503-perf
published: '2026-10-20'
updated: '2026-10-20'
sourceUpdated: '2026-10-20T21:23:52.573Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-87293'
references:
  - url: 'https://www.oracle.com/security-alerts/cpuoct2026.html'
    label: Oracle Advisory
tags:
  - cve.org
ingestedAt: '2026-10-20T22:23:33.873Z'
---

## Overview

Vulnerability in Oracle Java SE (component: RMI).  Supported versions that are affected are Oracle Java SE: 8u503 and  8u503-perf; Oracle GraalVM Enterprise Edition: 21.3.19.1.1. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Oracle Java SE.  While the vulnerability is in Oracle Java SE, attacks may significantly impact additional products (scope change).  Successful attacks of this vulnerability can result in  unauthorized update, insert or delete access to some of Oracle Java SE accessible data as well as  unauthorized read access to a subset of Oracle Java SE accessible data. Note: This vulnerability can only be exploited by supplying data to APIs in the specified Component without using Untrusted Java Web Start applications or Untrusted Java applets, such as through a web service. CVSS 3.1 Base Score 5.4 (Confidentiality and Integrity impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N).

## Affected

- `oracle_java_se 8u503`
- `oracle_java_se 8u503-perf`

## Remediation

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