CVE-2026-34282

Modified Modified - Updated After Analysis

Denial of Service in Oracle Java SE Networking Component

Publication date: 2026-04-21

Last updated on: 2026-06-30

Assigner: Oracle

Description

Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: Networking). Supported versions that are affected are Oracle Java SE: 8u481-perf, 11.0.30, 17.0.18, 21.0.10, 25.0.2, 26; Oracle GraalVM for JDK: 17.0.18 and 21.0.10; Oracle GraalVM Enterprise Edition: 21.3.17. Easily exploitable 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. 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 7.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-04-21

Last Modified

2026-06-30

Generated

2026-07-06

AI Q&A

2026-04-22

EPSS Evaluated

2026-07-05

NVD

CVE-2026-34282

Affected Vendors & Products

Vendor	Product	Version / Range
oracle	jre	1.8.0
oracle	jre	11.0.30
oracle	jre	17.0.18
oracle	jre	21.0.10
oracle	jre	25.0.2
oracle	jre	26
oracle	jdk	1.8.0
oracle	jdk	11.0.30
oracle	jdk	17.0.18
oracle	jdk	21.0.10
oracle	jdk	25.0.2
oracle	jdk	26
oracle	graalvm	21.3.17
oracle	graalvm_for_jdk	17.0.18
oracle	graalvm_for_jdk	21.0.10

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-835	The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.
CWE-400	The product does not properly control the allocation and maintenance of a limited resource.

Attack-Flow Graph

Compliance Impact

The vulnerability allows an unauthenticated attacker with network access to cause a denial of service (DoS) by hanging or crashing the affected Oracle Java SE and GraalVM products. However, it does not impact confidentiality or integrity of data.

Since the vulnerability does not result in unauthorized access to or modification of data, it primarily affects availability. Compliance standards like GDPR and HIPAA emphasize the protection of confidentiality, integrity, and availability of data. This vulnerability could impact availability requirements under these regulations if exploited, potentially causing service disruptions.

There is no direct information provided about specific compliance impacts or mitigation measures related to these standards.

Executive Summary

This vulnerability exists in the Networking component of Oracle Java SE, Oracle GraalVM for JDK, and Oracle GraalVM Enterprise Edition. It affects multiple supported versions of these products.

An unauthenticated attacker with network access via multiple protocols can exploit this vulnerability easily. The attack can be carried out by using APIs in the affected component, such as through a web service that supplies data to these APIs.

The vulnerability also applies to Java deployments that run sandboxed Java Web Start applications or sandboxed Java applets which load and run untrusted code, typically from the internet, relying on the Java sandbox for security.

Impact Analysis

Successful exploitation of this vulnerability can result in an unauthorized ability to cause a hang or a frequently repeatable crash, leading to a complete denial of service (DoS) of the affected Oracle Java SE, Oracle GraalVM for JDK, or Oracle GraalVM Enterprise Edition.

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