CVE-2026-71159

Modified Modified - Updated After Analysis

Helidon Imperative Web Server Information Disclosure

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 3.0.0-3.2.17. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Helidon. Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all Helidon accessible data as well as unauthorized update, insert or delete access to some of Helidon accessible data. CVSS 3.1 Base Score 8.2 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N).

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-2026-71159

Affected Vendors & Products

Vendor	Product	Version / Range
oracle	helidon	3.2.18

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 3.2.18 and allows unauthenticated attackers to exploit it via HTTP network access. Successful exploitation can lead to unauthorized access to critical data or full access to all Helidon accessible data, as well as unauthorized modifications to some data.

Detection Guidance

Since this is a vulnerability in Oracle Helidon's Imperative Web Server, detection involves checking for vulnerable versions of Helidon 3.2.18. Use commands like 'curl -v http://[target]:[port]/' to probe the server. Inspect server response headers for Helidon version details. Check application logs for unusual HTTP requests targeting Helidon endpoints.

Impact Analysis

If you use the affected Helidon version, an attacker could gain unauthorized access to sensitive data or modify certain data without authentication. This could lead to data breaches, loss of confidentiality, or integrity issues in your systems.

Compliance Impact

This vulnerability could lead to unauthorized data access or modification, which may violate compliance requirements under GDPR (data protection) and HIPAA (healthcare data privacy). Organizations using the affected Helidon version may face legal penalties or reputational damage.

Mitigation Strategies

Update Helidon to a version that is not affected by this vulnerability. If an update is not available, consider disabling the Imperative Web Server component or restricting network access to it via firewall rules until a patch is applied.

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