CVE-2026-83395
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Denial of Service in Oracle Java SE

Publication date: 2026-10-20

Last updated on: 2026-10-22

Assigner: Oracle

Description
Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: Networking). 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 and unauthorized ability to cause a partial denial of service (partial DOS) of Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition. 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 (Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L).

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Meta Information

Published
2026-10-20
Last Modified
2026-10-22
Generated
2026-11-10
AI Q&A
2026-10-21
EPSS Evaluated
2026-11-08
NVD
CVE-2026-83395
EUVD
EUVD-2026-106313

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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 unauthenticated attackers with network access to potentially modify or delete data and cause a partial denial of service. The attack can be executed via multiple protocols and APIs, including web services or untrusted Java applications.

Detection Guidance

This vulnerability affects Oracle Java SE, GraalVM for JDK, and GraalVM Enterprise Edition. Detection requires checking installed versions of these products against the affected versions listed in the CVE. No specific commands are provided in the CVE details for direct detection.

Impact Analysis

If you use affected versions of Oracle Java SE, GraalVM for JDK, or GraalVM Enterprise Edition, an attacker could alter or delete data in your system or disrupt services. This is especially risky for systems running untrusted Java code or web services that process external data.

Compliance Impact

This vulnerability allows unauthorized data modification and partial denial of service, which could violate GDPR integrity requirements and HIPAA security rules for protecting sensitive data. Unauthorized data changes may lead to compliance breaches under both regulations.

Mitigation Strategies

Apply the latest security patches from Oracle for affected Java SE, GraalVM for JDK, and 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, 27, or later as specified.

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