CVE-2026-47027

Analyzed Analyzed - Analysis Complete

Oracle Java SE Partial Denial of Service Vulnerability

Publication date: 2026-07-21

Last updated on: 2026-08-03

Assigner: Oracle

Description

Vulnerability in Oracle Java SE (component: Libraries). Supported versions that are affected are Oracle Java SE: 8u491, 8u491-perf, 11.0.31, 17.0.19, 21.0.11, 25.0.3, 26.0.1; Oracle GraalVM for JDK: 17.0.19 and 21.0.11; Oracle GraalVM Enterprise Edition: 21.3.18. Easily exploitable vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Oracle Java SE. Successful attacks of this vulnerability can result in unauthorized ability to cause a partial denial of service (partial DOS) of Oracle Java SE. 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 5.3 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L).

CVSS Scores

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Meta Information

Published

2026-07-21

Last Modified

2026-08-03

Generated

2026-08-11

AI Q&A

2026-07-22

EPSS Evaluated

2026-08-09

NVD

CVE-2026-47027

EUVD

EUVD-2026-46514

Affected Vendors & Products

Vendor	Product	Version / Range
oracle	graalvm	21.3.18
oracle	graalvm_for_jdk	17.0.19
oracle	graalvm_for_jdk	21.0.11
oracle	jre	1.8.0
oracle	jre	11.0.31
oracle	jre	17.0.19
oracle	jre	21.0.11
oracle	jre	25.0.3
oracle	jre	26.0.1
oracle	jre	1.8.0
oracle	jdk	1.8.0
oracle	jdk	11.0.31
oracle	jdk	17.0.19
oracle	jdk	21.0.11
oracle	jdk	25.0.3
oracle	jdk	26.0.1
oracle	jdk	1.8.0

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-284	The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.

Attack-Flow Graph

Executive Summary

This is a vulnerability in Oracle Java SE and GraalVM components. It allows unauthenticated attackers with network access to cause a partial denial of service (DOS) in affected versions. The issue stems from weaknesses in the Libraries component and can be exploited via multiple protocols or APIs, including web services or sandboxed Java applications.

Detection Guidance

Detection requires checking installed Java versions against affected releases. Use commands like 'java -version' to identify installed versions. Compare output against Oracle Java SE 8u491, 11.0.31, 17.0.19, 21.0.11, 25.0.3, 26.0.1 and GraalVM versions 17.0.19, 21.0.11, 21.3.18.

Impact Analysis

The vulnerability can lead to partial disruptions in Java SE services, causing downtime or reduced availability. Systems running vulnerable versions of Oracle Java SE, GraalVM for JDK, or GraalVM Enterprise Edition are at risk. Attackers could exploit it to degrade performance without needing authentication.

Compliance Impact

This vulnerability causes a partial denial of service in Oracle Java SE, which could disrupt availability of systems processing sensitive data. For GDPR, this may impact data availability requirements under Article 32. For HIPAA, it could affect system availability for protected health information processing.

Mitigation Strategies

Apply Oracle's security patches immediately for affected Java versions. If patches are unavailable, consider downgrading to a non-affected version or disabling Java in web browsers and applications until updates are applied.

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