CVE-2026-83281

Analyzed Analyzed - Analysis Complete

Denial of Service in Oracle Helidon

Publication date: 2026-09-15

Last updated on: 2026-09-28

Assigner: Oracle

Description

Vulnerability in the Helidon product of Oracle Fusion Middleware (component: helidon-webserver). Supported versions that are affected are 4.0.0-4.5.4. Easily exploitable vulnerability allows unauthenticated attacker with network access via TCP to compromise Helidon. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Helidon. 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

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Meta Information

Published

2026-09-15

Last Modified

2026-09-28

Generated

2026-10-06

AI Q&A

2026-09-16

EPSS Evaluated

2026-10-04

NVD

CVE-2026-83281

EUVD

EUVD-2026-79633

Affected Vendors & Products

Vendor	Product	Version / Range
oracle	helidon	From 4.0.0 (inc) to 4.5.4 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-400	The product does not properly control the allocation and maintenance of a limited resource.

Attack-Flow Graph

Executive Summary

This is a denial-of-service (DoS) vulnerability in Oracle Helidon versions 4.0.0 to 4.5.4. An unauthenticated attacker can remotely crash the Helidon web server by sending specially crafted TCP requests, causing it to hang or repeatedly crash.

Impact Analysis

If you use affected Helidon versions, an attacker could disrupt your web services by making the server unavailable. This leads to downtime, loss of service for users, and potential business disruption.

Compliance Impact

This vulnerability causes denial-of-service (DoS) conditions in Oracle Helidon, leading to system unavailability. Such disruptions may violate availability requirements in GDPR (Article 32) and HIPAA (Security Rule 164.308(a)(7)), which mandate maintaining access to critical systems. Unauthorized downtime could result in non-compliance if it impacts data processing or protected health information access.

Mitigation Strategies

Upgrade Helidon to a version later than 4.5.4 as this vulnerability affects versions 4.0.0 to 4.5.4. Monitor network traffic for unusual TCP activity targeting Helidon services.

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