CVE-2026-83387
Awaiting Analysis Awaiting Analysis - Queue

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: JDBC). 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 access to critical data or complete access to all 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 5.9 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N).

CVSS Scores

EPSS Scores

Probability:
Percentile:

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-2026-83387
EUVD
EUVD-2026-106305

Helpful Resources

Exploitability

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

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Executive Summary

This is a vulnerability in Oracle Java SE, GraalVM for JDK, and GraalVM Enterprise Edition affecting multiple versions. It allows an unauthenticated attacker with network access to potentially access critical or all accessible data in these products through APIs or web services. The attack is difficult to exploit but can lead to unauthorized data access.

Detection Guidance

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

Impact Analysis

If you use affected versions of Oracle Java SE, GraalVM for JDK, or GraalVM Enterprise Edition, an attacker could gain unauthorized access to sensitive data stored or processed by these systems. This includes data accessed via web services or untrusted Java applications running in sandboxed environments.

Compliance Impact

This vulnerability allows unauthorized access to critical data, which could lead to breaches of sensitive information. For GDPR, this may result in unauthorized data access violating principles of data protection and user rights. For HIPAA, it could compromise protected health information, leading to compliance violations and potential penalties.

Mitigation Strategies

Update affected Oracle Java SE, GraalVM for JDK, and GraalVM Enterprise Edition versions to the latest patched releases immediately. Disable unnecessary network access to Java applications and review API usage in web services that interact with the JDBC component.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-83387. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart

Security Radar

News mentioning this vulnerability
Loading related security news...