CVE-2026-73893

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 4.0.0-4.4.1. 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 as well as unauthorized read access to a subset of Helidon accessible data. CVSS 3.1 Base Score 6.5 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N).

CVSS Scores

EPSS 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

2026-09-07

NVD

CVE-2026-73893

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 unauthenticated attackers to remotely access and manipulate data via HTTP. The vulnerability has a CVSS score of 6.5, indicating moderate risk with potential impacts on confidentiality and integrity.

Detection Guidance

Since this is a vulnerability in Oracle Helidon 4.5.0, detection involves checking for affected versions and potential exploitation attempts. Verify if Helidon 4.5.0 is installed on your system. Monitor network traffic for unusual HTTP requests targeting Helidon services. Check logs for unauthorized access or data modification attempts.

Impact Analysis

An attacker could exploit this to read or modify some data accessible through Helidon without authentication. This could lead to unauthorized access to sensitive information or unintended changes to data, depending on the exposed data and system configuration.

Compliance Impact

This vulnerability could lead to unauthorized data access or modification, which may violate compliance requirements under GDPR (data protection) or HIPAA (health information privacy). Organizations using affected Helidon versions may face regulatory penalties or legal consequences if exploited.

Mitigation Strategies

Update Helidon to a version unaffected by this vulnerability. If immediate update is not possible, restrict network access to the Imperative Web Server component via firewall rules or network segmentation.

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