Remote Code Execution in Oracle Java SE

Publication date: 2026-10-20

Last updated on: 2026-10-20

Assigner: Oracle

Description

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).

CVSS Scores

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Meta Information

Published

2026-10-20

Last Modified

2026-10-20

Generated

2026-10-21

AI Q&A

2026-10-21

EPSS Evaluated

N/A

NVD

CVE-2026-87293

Affected Vendors & Products

Vendor	Product	Version / Range
Oracle	Corporation	Oracle Java SE 8u503
Oracle	Corporation	Oracle Java SE 8u503-perf

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-UNKNOWN

Attack-Flow Graph

Executive Summary

This is a vulnerability in Oracle Java SE's RMI component affecting versions 8u503 and 8u503-perf, as well as GraalVM Enterprise Edition 21.3.19.1.1. It allows unauthenticated attackers with network access to potentially compromise Java SE by exploiting weaknesses in the RMI protocol. The attack requires supplying data to specific APIs without using Java Web Start or applets, such as through a web service.

Impact Analysis

An attacker could exploit this to gain unauthorized access to some Oracle Java SE data, allowing them to read or modify certain information. This could lead to data breaches, unauthorized changes, or data loss if the affected Java SE instance processes sensitive information.

Mitigation Strategies

Update Oracle Java SE to a version that is not affected by this vulnerability. Monitor Oracle's security advisories for patches and apply them promptly. Restrict network access to RMI services if possible.

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