CVE-2026-73881

Modified Modified - Updated After Analysis

Denial of Service in Helidon

Publication date: 2026-08-18

Last updated on: 2026-08-28

Assigner: Oracle

Description

Vulnerability in the Helidon product of Oracle Fusion Middleware (component: Imperative Web Server). Supported versions that are affected are 4.0.0-4.4.1. Easily exploitable vulnerability allows low privileged 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 as well as unauthorized read access to a subset of Helidon accessible data. CVSS 3.1 Base Score 5.4 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N).

CVSS Scores

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Meta Information

Published

2026-08-18

Last Modified

2026-08-28

Generated

2026-09-08

AI Q&A

2026-08-19

EPSS Evaluated

2026-09-06

NVD

CVE-2026-73881

Affected Vendors & Products

Vendor	Product	Version / Range
oracle	helidon	4.5.0

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 Imperative Web Server component. It affects version 4.5.0 and allows a low-privileged attacker with network access via HTTP to compromise the system. The vulnerability enables unauthorized data access and modifications, including read, update, insert, or delete operations on accessible data.

Detection Guidance

Since no specific detection methods or commands are provided in the CVE details, general approaches include checking for vulnerable Helidon versions (4.5.0) and monitoring HTTP traffic for unusual data access patterns. Verify installed versions with package managers like 'mvn dependency:tree' for Java applications or 'dpkg -l' for Debian-based systems.

Impact Analysis

If you use the affected Helidon version, an attacker could gain unauthorized access to sensitive data, modify or delete information, or insert malicious data. This could lead to data breaches, loss of data integrity, or unauthorized system changes, depending on the attacker's goals.

Compliance Impact

This vulnerability could lead to non-compliance with GDPR or HIPAA due to unauthorized data access or modification. GDPR requires protection against unauthorized data processing, while HIPAA mandates safeguards for protected health information. A breach could result in legal penalties or fines.

Mitigation Strategies

Update Helidon to a version later than 4.5.0 to address the vulnerability. Apply necessary patches from Oracle as soon as they are available.

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