CVE-2026-83376
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Denial of Service 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: JSSE). 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 TLS 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
2026-10-27
Generated
2026-11-10
AI Q&A
2026-10-21
EPSS Evaluated
2026-11-08
NVD
CVE-2026-83376
EUVD
EUVD-2026-106294

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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 related to the JSSE component. It allows an unauthenticated attacker with network access via TLS to potentially modify some data in these products. The attack is difficult to perform and has a low impact on integrity.

Detection Guidance

This vulnerability affects Oracle Java SE, GraalVM for JDK, and GraalVM Enterprise Edition versions listed. Detection involves checking installed Java versions against the affected releases. Use commands like 'java -version' or 'where java' to identify installed versions. Compare these against the affected versions (8u503, 11.0.32.1, 17.0.20.1, 21.0.12.1, 25.0.4.1, 27, etc.).

For network detection, monitor TLS traffic for unusual patterns or unauthorized data modifications. No specific commands are provided in the context for active exploitation detection.

Impact Analysis

An attacker could exploit this to modify some data in Oracle Java SE, GraalVM for JDK, or GraalVM Enterprise Edition. This could affect applications relying on these components, especially those running untrusted code like Java Web Start or applets.

Compliance Impact

This vulnerability allows unauthorized modification of data, which could lead to integrity issues. For GDPR, this may impact data integrity principles under Article 5. For HIPAA, it could affect integrity requirements for protected health information.

Mitigation Strategies

Update affected Oracle Java SE, GraalVM for JDK, and GraalVM Enterprise Edition versions to the latest patched releases immediately. Disable Java Web Start applications and sandboxed Java applets if they are not required. Restrict network access to TLS endpoints where possible.

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