CVE-2026-101590

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Unauthenticated Data Access in Oracle Helidon

Publication date: 2026-10-20

Last updated on: 2026-10-22

Assigner: Oracle

Description

Vulnerability in the Helidon product of Oracle Fusion Middleware (component: helidon-microprofile-security). Supported versions that are affected are 4.0.0-4.5.5. 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. CVSS 3.1 Base Score 9.1 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N).

CVSS Scores

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Meta Information

Published

2026-10-20

Last Modified

2026-10-22

Generated

2026-11-10

AI Q&A

2026-10-21

EPSS Evaluated

2026-11-08

NVD

CVE-2026-101590

EUVD

EUVD-2026-105998

Affected Vendors & Products

Vendor	Product	Version / Range
Oracle Corporation	Helidon	4.0.0

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-306	The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.
CWE-287	When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.

Attack-Flow Graph

Executive Summary

This is a vulnerability in Oracle Fusion Middleware's Helidon product, specifically in the helidon-microprofile-security component. It affects versions 4.0.0 to 4.5.5. An unauthenticated attacker can exploit it remotely via HTTP to gain unauthorized access to critical data or modify/delete data in the Helidon system.

Detection Guidance

This vulnerability affects Oracle Helidon versions 4.0.0 to 4.5.5. To detect it, check the installed Helidon version using commands like 'java -jar helidon.jar --version' or inspect application logs for Helidon-related services. Monitor network traffic for unauthorized HTTP access to Helidon endpoints.

Impact Analysis

If you use affected versions of Helidon, an attacker could steal, modify, or delete sensitive data without authentication. This could lead to data breaches, loss of confidential information, or system compromise, depending on what data the Helidon system handles.

Compliance Impact

This vulnerability could lead to unauthorized access or modification of sensitive data, which would violate GDPR (data protection) and HIPAA (health information privacy) requirements. Organizations using affected Helidon versions may face compliance violations, legal penalties, and reputational damage.

Mitigation Strategies

Upgrade Helidon to a version later than 4.5.5 as specified in the vulnerability description to address the issue.

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