CVE-2026-87294
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Memory Corruption in Oracle Java SE

Publication date: 2026-10-20

Last updated on: 2026-10-27

Assigner: Oracle

Description
Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: Security). Supported versions that are affected are Oracle Java SE: 8u503, 8u503-perf, 11.0.32.1, 17.0.20.1, 21.0.12.1, 25.0.4.1, 27; Oracle GraalVM for JDK: 17.0.20.1 and 21.0.12.1; Oracle GraalVM Enterprise Edition: 21.3.19.1.1. Easily exploitable vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition. Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition accessible data as well as unauthorized read access to a subset of Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition accessible data. Note: This vulnerability can be exploited by using APIs in the specified Component, e.g., through a web service which supplies data to the APIs. This vulnerability also applies to Java deployments, typically in clients running sandboxed Java Web Start applications or sandboxed Java applets, that load and run untrusted code (e.g., code that comes from the internet) and rely on the Java sandbox for security. CVSS 3.1 Base Score 6.5 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N).

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Meta Information

Published
2026-10-20
Last Modified
2026-10-27
Generated
2026-11-10
AI Q&A
2026-10-21
EPSS Evaluated
2026-11-08
NVD
CVE-2026-87294
EUVD
EUVD-2026-106335

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-284 The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.

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Executive Summary

This is a vulnerability in Oracle Java SE, Oracle GraalVM for JDK, and Oracle GraalVM Enterprise Edition. It allows an unauthenticated attacker with network access to potentially modify or read some data in these products. The issue is exploitable through multiple protocols and APIs, including web services or Java Web Start applications.

Detection Guidance

Detecting this vulnerability requires checking the installed versions of Oracle Java SE, Oracle GraalVM for JDK, or Oracle GraalVM Enterprise Edition. Compare installed versions against the affected versions listed in the CVE description (e.g., 8u503, 11.0.32.1, 17.0.20.1, etc.). Use commands like java -version or graalvm --version to check versions.

Impact Analysis

An attacker could exploit this to gain unauthorized access to sensitive data or make unauthorized changes to data within the affected Java environments. This could lead to data breaches or data integrity issues if the Java applications handle confidential information.

Compliance Impact

This vulnerability could lead to unauthorized data access or modification, which may violate compliance requirements under GDPR (data protection) or HIPAA (health information privacy). Organizations using affected Java versions must address this to maintain regulatory compliance.

Mitigation Strategies

Apply the latest security patches from Oracle to upgrade to a non-vulnerable version of Oracle Java SE, Oracle GraalVM for JDK, or Oracle GraalVM Enterprise Edition. If immediate patching is not possible, consider disabling affected components or restricting network access to them until patches are applied.

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