CVE-2026-101569

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Denial of Service 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-common-concurrency-limits). 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 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).

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-2026-101569

EUVD

EUVD-2026-105977

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-284	The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.

Attack-Flow Graph

Executive Summary

This is a vulnerability in Oracle Fusion Middleware's Helidon product, specifically in the helidon-common-concurrency-limits component. It affects versions 4.0.0-4.5.5 and 27.0.0. An unauthenticated attacker can exploit it via HTTP to compromise the system, leading to unauthorized data modifications and partial denial of service.

Impact Analysis

If you use the affected Helidon versions, an attacker could modify or delete data without authentication, disrupt system availability, or cause partial outages. This could lead to data corruption, service interruptions, or unauthorized changes to critical information.

Compliance Impact

This vulnerability could violate compliance requirements by allowing unauthorized data access or modification, which is a key concern for GDPR (data integrity) and HIPAA (protected health information). Organizations using affected versions may face regulatory penalties or breaches of trust.

Mitigation Strategies

Update Helidon to a version unaffected by this vulnerability (4.5.6 or later for 4.x, 27.0.1 or later for 27.x). If immediate update is not possible, restrict network access to Helidon via firewall rules or disable HTTP access until patched.

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