CVE-2026-91382
Received Received - Intake

Memory Corruption in Oracle Java SE

Publication date: 2026-10-20

Last updated on: 2026-10-21

Assigner: Oracle

Description
Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: 2D). Supported versions that are affected are Oracle Java SE: 8u503, 8u503-perf, 11.0.32.1, 17.0.20.1; 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 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:H/PR:N/UI:N/S:U/C:N/I:H/A:L).

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Meta Information

Published
2026-10-20
Last Modified
2026-10-21
Generated
2026-11-10
AI Q&A
2026-10-21
EPSS Evaluated
2026-11-08
NVD
CVE-2026-91382
EUVD
EUVD-2026-106636

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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, GraalVM for JDK, and GraalVM Enterprise Edition affecting specific versions. It allows an unauthenticated attacker with network access to compromise these products through multiple protocols. Successful exploitation could lead to unauthorized data modification or deletion and partial denial of service.

Detection Guidance

Detection requires checking installed Java versions and verifying if they match affected versions (8u503, 8u503-perf, 11.0.32.1, 17.0.20.1, 21.0.12.1, 21.3.19.1.1). Use commands like 'java -version' or check package managers (e.g., 'apt list --installed | grep jdk' on Debian/Ubuntu).

Impact Analysis

If you use affected versions of Oracle Java SE, GraalVM for JDK, or GraalVM Enterprise Edition, an attacker could modify or delete critical data or cause partial service disruption. This is especially risky for systems running untrusted Java code from the internet.

Compliance Impact

This vulnerability allows unauthorized modification or deletion of critical data and partial denial of service, which could violate integrity and availability requirements in GDPR and HIPAA. Unauthorized data access or modification risks non-compliance with data protection principles.

Mitigation Strategies

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

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