---
id: CVE-2026-101581
title: >-
  Vulnerability in the Helidon product of Oracle Fusion Middleware (component:
  helidon-webclient-dns-resolver-round-robin)
summary: >-
  Vulnerability in the Helidon product of Oracle Fusion Middleware (component:
  helidon-webclient-dns-resolver-round-robin).  Supported versions that are
  affected are 4.0.0-4.5.5 and 27.0.0. Easily exploitable vulnerability allows
  unauthent…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L'
cvssSource: cna
vendor: Oracle Corporation
product: Helidon
affected:
  - Helidon >= 4.0.0 <= 4.5.5
  - Helidon 27.0.0
published: '2026-10-20'
updated: '2026-10-20'
sourceUpdated: '2026-10-20T21:21:40.964Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-101581'
references:
  - url: 'https://www.oracle.com/security-alerts/cpuoct2026.html'
    label: Oracle Advisory
tags:
  - cve.org
ingestedAt: '2026-10-20T22:23:33.982Z'
---

## Overview

Vulnerability in the Helidon product of Oracle Fusion Middleware (component: helidon-webclient-dns-resolver-round-robin).  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 DNS to compromise Helidon.  Successful attacks of this vulnerability can result in  unauthorized update, insert or delete access to some of Helidon accessible data and unauthorized ability to cause a partial denial of service (partial DOS) of Helidon. CVSS 3.1 Base Score 6.5 (Integrity and Availability impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L).

## Affected

- `Helidon >= 4.0.0 <= 4.5.5`
- `Helidon 27.0.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.