CVE-2026-87367
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XML External Entity Processing Vulnerability in Oracle Java SE

Publication date: 2026-10-20

Last updated on: 2026-10-28

Assigner: Oracle

Description
Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: JAXP). 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. Difficult to exploit 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. 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 3.7 (Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N).

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Meta Information

Published
2026-10-20
Last Modified
2026-10-28
Generated
2026-11-10
AI Q&A
2026-10-21
EPSS Evaluated
2026-11-08
NVD
CVE-2026-87367
EUVD
EUVD-2026-106408

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-200 The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.

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Executive Summary

This is a vulnerability in Oracle Java SE, Oracle GraalVM for JDK, and Oracle GraalVM Enterprise Edition affecting multiple versions. It involves the JAXP component and allows unauthenticated attackers to potentially modify data via network access. The attack complexity is high, requiring no user interaction.

Detection Guidance

Detection involves checking installed Java versions and verifying if they fall within affected ranges. Use commands like 'java -version' to check the version. Compare against 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; or Oracle GraalVM Enterprise Edition 21.3.19.1.1.

Impact Analysis

An attacker could exploit this to modify data in applications using the affected Java versions. This could lead to data corruption or unauthorized changes in systems relying on these Java components, especially in web services or sandboxed Java applications.

Compliance Impact

This vulnerability could impact compliance by allowing unauthorized data modifications, potentially violating integrity requirements in GDPR or HIPAA. Organizations using affected Java versions may need to assess risks to data protection and integrity controls.

Mitigation Strategies

Apply the latest security patches from Oracle for affected Java SE, GraalVM for JDK, or GraalVM Enterprise Edition versions. Update to versions 8u503-perf, 11.0.32.1, 17.0.20.1, 21.0.12.1, 25.0.4.1, or 27 for Java SE. Disable unnecessary Java Web Start or applet deployments if sandboxed execution is not required.

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