CVE-2026-83480

Analyzed Analyzed - Analysis Complete

Denial of Service in Helidon WebSocket

Publication date: 2026-09-15

Last updated on: 2026-09-25

Assigner: Oracle

Description

Vulnerability in the Helidon product of Oracle Fusion Middleware (component: WebSocket). 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

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Meta Information

Published

2026-09-15

Last Modified

2026-09-25

Generated

2026-10-06

AI Q&A

2026-09-16

EPSS Evaluated

2026-10-04

NVD

CVE-2026-83480

EUVD

EUVD-2026-79767

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 WebSocket 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

Detecting this vulnerability requires checking if your Helidon version is between 4.0.0 and 4.5.4. Use commands like 'java -jar helidon.jar --version' or check application logs for Helidon startup messages to identify the version.

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 WebSocket functionality.

Compliance Impact

This vulnerability causes partial denial of service in Oracle Helidon, which could disrupt availability of services. While not directly violating GDPR or HIPAA, such disruptions may impact compliance with availability requirements under these regulations if the affected system processes personal or health data.

Mitigation Strategies

Upgrade Helidon to a version later than 4.5.4 immediately. If upgrading is not possible, restrict network access to the WebSocket component via firewall rules or disable the WebSocket feature if not required.

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