CVE-2026-73876

Modified Modified - Updated After Analysis

Unauthenticated Data Access 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 4.0.0-4.5.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Helidon. While the vulnerability is in Helidon, attacks may significantly impact additional products (scope change). 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 7.2 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/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-2026-73876

Affected Vendors & Products

Vendor	Product	Version / Range
oracle	helidon	4.5.1

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. The affected version is 4.5.1. An unauthenticated attacker can exploit it remotely via HTTP to compromise Helidon. Successful exploitation may allow unauthorized data access or modification.

Detection Guidance

Since no specific detection methods or commands are provided in the CVE details, check for Helidon version 4.5.1 running on your system. Inspect network traffic for HTTP requests targeting Helidon services. Monitor for unauthorized data access or modifications in Helidon accessible data.

Impact Analysis

An attacker could read or alter some of your Helidon-accessible data without authentication. This could lead to data breaches, unauthorized changes, or service disruption if the system is exposed to the internet.

Compliance Impact

This vulnerability could lead to unauthorized data access or modification, which may violate GDPR (data protection) or HIPAA (health data privacy) requirements. Organizations using Helidon 4.5.1 must address this to maintain compliance.

Mitigation Strategies

Upgrade Helidon to a version unaffected by this vulnerability. If upgrading is not immediately possible, restrict network access to the Imperative Web Server component via firewall rules or network segmentation. Monitor for unusual data access or modification attempts.

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