CVE-2026-101586

Deferred Deferred - Pending Action

Information Disclosure in Oracle Helidon

Publication date: 2026-10-20

Last updated on: 2026-11-06

Assigner: Oracle

Description

Vulnerability in the Helidon product of Oracle Fusion Middleware (component: helidon-webclient). Supported versions that are affected are 4.0.0-4.5.5 and 27.0.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Helidon. Successful attacks of this vulnerability can result in unauthorized read access to a subset of Helidon accessible data. CVSS 3.1 Base Score 5.3 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N).

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Meta Information

Published

2026-10-20

Last Modified

2026-11-06

Generated

2026-11-10

AI Q&A

2026-10-21

EPSS Evaluated

2026-11-08

NVD

CVE-2026-101586

EUVD

EUVD-2026-105994

Affected Vendors & Products

Vendor	Product	Version / Range
Oracle Corporation	Helidon	4.0.0
Oracle Corporation	Helidon	27.0.0

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-200	The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.

Attack-Flow Graph

Executive Summary

This is a vulnerability in Oracle Fusion Middleware's Helidon product, specifically in the helidon-webclient component. It affects versions 4.0.0-4.5.5 and 27.0.0. The issue allows an unauthenticated attacker to remotely access the system via HTTP and potentially read a subset of data accessible by Helidon.

Detection Guidance

Detecting this vulnerability requires checking if your system is running an affected version of Oracle Helidon (4.0.0-4.5.5 or 27.0.0). Inspect installed Helidon packages using commands like 'java -jar helidon.jar --version' or package managers like 'dpkg -l | grep helidon' on Linux. Monitor network traffic for unusual HTTP requests targeting Helidon services.

Impact Analysis

An attacker could exploit this to gain unauthorized read access to sensitive data handled by the Helidon webclient. This may include confidential or proprietary information, depending on what the application processes.

Compliance Impact

This vulnerability could lead to unauthorized data exposure, which may violate GDPR (data protection) or HIPAA (health information privacy) if sensitive personal or health data is accessed. Compliance could be compromised due to unauthorized access.

Mitigation Strategies

Immediately upgrade Helidon to a patched version if available. If upgrading is not possible, restrict network access to Helidon services via firewalls or disable HTTP interfaces. Apply network-level controls to block unauthorized access attempts.

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