---
id: CVE-2026-101570
title: >-
  Vulnerability in the Helidon product of Oracle Fusion Middleware (component:
  helidon-webserver-http2)
summary: >-
  Vulnerability in the Helidon product of Oracle Fusion Middleware (component:
  helidon-webserver-http2).  Supported versions that are affected are
  4.0.0-4.5.5. Difficult to exploit vulnerability allows unauthenticated
  attacker with network…
severity: low
cvss: 3.7
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L'
cvssSource: cna
vendor: Oracle Corporation
product: Helidon
affected:
  - Helidon >= 4.0.0 <= 4.5.5
published: '2026-10-20'
updated: '2026-10-20'
sourceUpdated: '2026-10-20T21:21:36.913Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-101570'
references:
  - url: 'https://www.oracle.com/security-alerts/cpuoct2026.html'
    label: Oracle Advisory
tags:
  - cve.org
ingestedAt: '2026-10-20T22:23:33.986Z'
---

## Overview

Vulnerability in the Helidon product of Oracle Fusion Middleware (component: helidon-webserver-http2).  Supported versions that are affected are 4.0.0-4.5.5. Difficult to exploit vulnerability allows unauthenticated attacker with network access via HTTP/2 to compromise Helidon.  Successful attacks of this vulnerability can result in unauthorized ability to cause a partial denial of service (partial DOS) of Helidon. CVSS 3.1 Base Score 3.7 (Availability impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L).

## Affected

- `Helidon >= 4.0.0 <= 4.5.5`

## Remediation

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