CVE-2026-91415

Received Received - Intake

Denial of Service in Oracle Java SE

Publication date: 2026-10-20

Last updated on: 2026-10-20

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, 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 ability to cause a hang or frequently repeatable crash (complete DOS) of Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition as well as unauthorized update, insert or delete access to some of Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition accessible data and unauthorized read access to a subset 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 7.0 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H).

CVSS Scores

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Meta Information

Published

2026-10-20

Last Modified

2026-10-20

Generated

2026-10-21

AI Q&A

2026-10-21

EPSS Evaluated

N/A

NVD

CVE-2026-91415

Affected Vendors & Products

Vendor	Product	Version / Range
Oracle	Corporation	Oracle Java SE 8u503
Oracle	Corporation	Oracle Java SE 8u503-perf
Oracle	Corporation	Oracle Java SE 11.0.32.1
Oracle	Corporation	Oracle Java SE 17.0.20.1
Oracle	Corporation	Oracle Java SE 21.0.12.1
Oracle	Corporation	Oracle Java SE 25.0.4.1
Oracle	Corporation	Oracle Java SE 27
Oracle	Corporation	Oracle GraalVM for JDK 17.0.20.1
Oracle	Corporation	Oracle GraalVM for JDK 21.0.12.1
Oracle	Corporation	Oracle GraalVM Enterprise Edition 21.3.19.1.1

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-UNKNOWN

Attack-Flow Graph

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 to cause a denial of service (hang or crash) or gain unauthorized read, update, insert, or delete access to some data via network protocols. The attack is difficult to exploit but can impact confidentiality, integrity, and availability.

Impact Analysis

If you use affected versions of Oracle Java SE, GraalVM for JDK, or GraalVM Enterprise Edition, an attacker could crash your Java applications or access sensitive data. This is especially risky for Java deployments running untrusted code, such as web applications or applets, as it bypasses sandbox protections.

Compliance Impact

This vulnerability could lead to unauthorized data access or modification, violating GDPR (data protection) and HIPAA (health data privacy) requirements. Organizations must address it to maintain compliance with these 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. Disable Java Web Start applications and untrusted Java applets if not required.

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