CVE-2026-83374
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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. 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 creation, deletion or modification access to critical data or 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 (Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/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-2026-83374
EUVD
EUVD-2026-106292

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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, GraalVM for JDK, and GraalVM Enterprise Edition affecting multiple versions. It allows unauthenticated attackers with network access to potentially modify or delete critical data or all accessible data in these products. The attack is difficult to exploit and primarily impacts data integrity.

Detection Guidance

Detection requires checking installed Java versions against affected releases. Use commands like 'java -version' or 'where java' to identify installed versions. Compare against Oracle Java SE 8u503, 11.0.32.1, 17.0.20.1, 21.0.12.1, 25.0.4.1, 27; GraalVM 17.0.20.1, 21.0.12.1; or GraalVM Enterprise 21.3.19.1.1.

Impact Analysis

If exploited, this vulnerability could allow unauthorized changes to critical data in systems running affected Java versions. This includes data modification or deletion in Java applications, especially those running untrusted code like web-based Java applets or applications.

Compliance Impact

This vulnerability allows unauthorized modification of critical data, which could lead to violations of data integrity requirements in GDPR and HIPAA. GDPR mandates strict data accuracy and protection, while HIPAA requires safeguards for protected health information integrity. Exploitation could result in non-compliance with these regulations.

Mitigation Strategies

Apply Oracle's security patches immediately for affected Java versions. Disable Java Web Start and applets if unused. Restrict network access to Java services. Monitor for unauthorized data changes or deletions.

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