CVE-2026-71167

Modified Modified - Updated After Analysis

Unauthenticated Data Access in Oracle 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 creation, deletion or modification access to critical data or all Helidon accessible data as well as unauthorized access to critical data or complete access to all Helidon accessible data and unauthorized ability to cause a partial denial of service (partial DOS) of Helidon. CVSS 3.1 Base Score 9.4 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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-2026-71167

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 Fusion Middleware's Helidon product, specifically in the Imperative Web Server component. It affects version 4.5.0 and allows unauthenticated attackers to exploit it via HTTP network access. Successful exploitation can lead to unauthorized data creation, deletion, or modification, unauthorized data access, and partial denial of service (DOS) of the Helidon system.

Detection Guidance

Since no specific detection methods or commands are provided in the CVE details, general vulnerability scanning tools like Nmap, Nessus, or OpenVAS can be used to check for vulnerable versions of Oracle Helidon 4.5.0. Monitor network traffic for unusual HTTP requests targeting Helidon services.

Impact Analysis

If you use Helidon 4.5.0, an attacker could gain full access to your critical data, modify or delete it, or disrupt service. This could lead to data breaches, loss of sensitive information, or system downtime, depending on your deployment.

Compliance Impact

This vulnerability could severely impact compliance with GDPR and HIPAA by enabling unauthorized access to or modification of sensitive data. GDPR requires protection of personal data, while HIPAA mandates safeguards for protected health information. Exploitation could result in non-compliance, legal penalties, or data loss.

Mitigation Strategies

Upgrade Helidon to a version unaffected by this vulnerability. If upgrading is not immediately possible, restrict network access to the Imperative Web Server component via firewall rules or disable it if unused.

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