CVE-2026-73918

Modified Modified - Updated After Analysis

Unauthenticated Data Access in Helidon

Publication date: 2026-08-18

Last updated on: 2026-08-28

Assigner: Oracle

Description

Vulnerability in the Helidon product of Oracle Fusion Middleware (component: Imperative Web Server). Supported versions that are affected are 4.0.0-4.4.1. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Helidon. Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Helidon accessible data as well as unauthorized read access to a subset of Helidon accessible data and unauthorized ability to cause a partial denial of service (partial DOS) of Helidon. CVSS 3.1 Base Score 7.3 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L).

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-08-18

Last Modified

2026-08-28

Generated

2026-09-08

AI Q&A

2026-08-19

EPSS Evaluated

2026-09-07

NVD

CVE-2026-73918

Affected Vendors & Products

Vendor	Product	Version / Range
oracle	helidon	4.5.0

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 Helidon 4.5.0, an Imperative Web Server component of Oracle Fusion Middleware. It allows unauthenticated attackers to remotely access and manipulate data, read some data, and cause partial denial of service via HTTP network access.

Detection Guidance

Since no specific detection methods or commands are provided in the CVE details, general approaches include checking for vulnerable Helidon versions (4.5.0) using package managers or scanning tools. Monitor network traffic for unusual HTTP requests targeting Helidon services. Ensure logs are reviewed for unauthorized access attempts or data modifications.

Impact Analysis

An attacker could exploit this to modify or delete data, steal sensitive information, or disrupt service availability for the Helidon server. This could lead to data breaches, system outages, or unauthorized changes to applications relying on Helidon.

Compliance Impact

This vulnerability could lead to unauthorized data access or modification, violating GDPR's data protection requirements and HIPAA's safeguards for protected health information. Organizations using Helidon may face compliance violations, legal penalties, and reputational damage.

Mitigation Strategies

Immediately update Helidon to a version unaffected by this vulnerability. If updating is not possible, restrict network access to the Imperative Web Server component via firewall rules or disable the service if not in use.

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