---
id: CVE-2026-87255
title: 'Vulnerability in Oracle Java SE (component: Compiler)'
summary: >-
  Vulnerability in Oracle Java SE (component: Compiler).  Supported versions
  that are affected are Oracle Java SE: 25.0.4.1 and  27. Difficult to exploit
  vulnerability allows unauthenticated attacker with network access via multiple
  protoc…
severity: low
cvss: 3.7
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N'
cvssSource: cna
vendor: Oracle Corporation
product: Oracle Java SE
affected:
  - oracle_java_se 25.0.4.1
  - oracle_java_se 27
published: '2026-10-20'
updated: '2026-10-20'
sourceUpdated: '2026-10-20T21:23:50.728Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-87255'
references:
  - url: 'https://www.oracle.com/security-alerts/cpuoct2026.html'
    label: Oracle Advisory
tags:
  - cve.org
ingestedAt: '2026-10-20T22:23:33.875Z'
---

## Overview

Vulnerability in Oracle Java SE (component: Compiler).  Supported versions that are affected are Oracle Java SE: 25.0.4.1 and  27. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Oracle Java SE.  Successful attacks of this vulnerability can result in  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 3.7 (Confidentiality impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N).

## Affected

- `oracle_java_se 25.0.4.1`
- `oracle_java_se 27`

## Remediation

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