CVE-2026-101588

Deferred Deferred - Pending Action

Information Disclosure in Oracle Helidon WebSocket

Publication date: 2026-10-20

Last updated on: 2026-11-06

Assigner: Oracle

Description

Vulnerability in the Helidon product of Oracle Fusion Middleware (component: WebSocket). 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-2026-101588

EUVD

EUVD-2026-105996

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 vulnerability affects Oracle Fusion Middleware's Helidon product, specifically the WebSocket component. It impacts versions 4.0.0-4.5.5 and 27.0.0. The issue allows unauthenticated attackers to access a subset of Helidon's data through HTTP network access. The vulnerability has a CVSS base score of 5.3, indicating a medium severity with confidentiality impacts.

Detection Guidance

To detect this vulnerability, check if your Helidon versions are within the affected range (4.0.0-4.5.5 or 27.0.0). Inspect network traffic for unauthorized HTTP access attempts to Helidon WebSocket endpoints.

Impact Analysis

An attacker could exploit this to gain unauthorized read access to some data in the Helidon system. This may lead to exposure of sensitive information, though the scope is limited to a subset of accessible data. The attack requires network access but no authentication.

Compliance Impact

This vulnerability could lead to unauthorized data access, which may violate compliance requirements under GDPR or HIPAA if sensitive data is exposed. Organizations using affected Helidon versions should assess potential data exposure risks and apply patches promptly.

Mitigation Strategies

Upgrade Helidon to a version beyond the affected range (4.5.5 or 27.0.0). If immediate upgrade is not possible, restrict network access to Helidon WebSocket endpoints via firewall rules or disable the WebSocket component if unused.

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