CVE-2026-71156

Modified Modified - Updated After Analysis

Unauthenticated Data Manipulation 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 3.0.0-3.2.18. 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. CVSS 3.1 Base Score 5.3 (Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/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

2026-09-06

NVD

CVE-2026-71156

Affected Vendors & Products

Vendor	Product	Version / Range
oracle	helidon	3.2.19

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 vulnerability affects Oracle Fusion Middleware's Helidon product, specifically version 3.2.19. It allows an unauthenticated attacker to remotely access the Imperative Web Server component via HTTP and potentially modify data without permission.

Detection Guidance

To detect this vulnerability, check if your system is running Helidon version 3.2.19. Use commands like 'java -jar helidon.jar --version' or inspect application logs for Helidon framework usage. Monitor network traffic for HTTP requests targeting Helidon endpoints.

Impact Analysis

An attacker could exploit this to alter data in the Helidon system, leading to unauthorized changes. This could disrupt services or corrupt data integrity.

Compliance Impact

This vulnerability allows unauthorized modification of data, which could lead to violations of integrity requirements in standards like GDPR (data integrity) and HIPAA (data integrity and availability). Unauthorized data changes may result in non-compliance if sensitive data is altered without authorization.

Mitigation Strategies

Update Helidon to a version later than 3.2.19 to address the vulnerability. If immediate update is not possible, restrict network access to the Imperative Web Server component via firewall rules or network segmentation.

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