CVE-2026-83458

Analyzed Analyzed - Analysis Complete

Denial of Service in 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: JSON). Supported versions that are affected are 4.0.0-4.5.4. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Helidon. Successful attacks of this vulnerability can result in unauthorized ability to cause a partial denial of service (partial DOS) of Helidon. 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

EPSS 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-2026-83458

EUVD

EUVD-2026-79757

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 vulnerability in Oracle Fusion Middleware's Helidon product, specifically in the JSON component. It affects versions 4.0.0 to 4.5.4. An unauthenticated attacker can exploit it remotely via HTTP to cause a partial denial of service (DOS) in Helidon.

Detection Guidance

This vulnerability affects Oracle Helidon versions 4.0.0 to 4.5.4. Detection requires checking the installed version of Helidon. If the version is within the affected range, the system is vulnerable. No specific commands are provided in the context to detect exploitation attempts.

Impact Analysis

The vulnerability allows an attacker to disrupt the availability of Helidon services, leading to partial service outages. This could affect applications relying on Helidon for JSON processing.

Compliance Impact

This vulnerability causes partial denial of service in Oracle Helidon, which may impact availability of systems processing personal or sensitive data. Compliance with GDPR or HIPAA could be affected if the DOS disrupts data processing operations, potentially leading to violations of availability requirements or service level agreements.

Mitigation Strategies

Upgrade Helidon to a version later than 4.5.4 as this vulnerability affects versions 4.0.0 to 4.5.4. Apply the latest security patches from Oracle immediately.

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