CVE-2026-73901

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. Difficult to exploit 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 4.8 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/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

2026-09-07

NVD

CVE-2026-73901

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. It affects version 4.5.1 and allows unauthenticated attackers to remotely access and modify some data through HTTP requests. The impact includes unauthorized read, update, insert, or delete access to a subset of Helidon's accessible data.

Detection Guidance

This vulnerability affects Oracle Helidon 4.5.1 via the Imperative Web Server component. Detection requires checking for exposed Helidon instances on HTTP ports. Scan your network for open ports 80 or 443 hosting Helidon services. Use commands like 'curl -v http://<target-ip> -H "User-Agent: Helidon"' to identify Helidon server responses. Verify software versions with 'curl -s http://<target-ip>/management/version' if the endpoint is accessible.

Impact Analysis

If you use the affected Helidon version, an attacker could exploit this to access or alter sensitive data without authentication. This could lead to data breaches, unauthorized changes, or exposure of confidential information, depending on what data Helidon handles in your environment.

Compliance Impact

This vulnerability could lead to unauthorized data access or modification, which may violate compliance requirements under GDPR (data protection) or HIPAA (healthcare data). Organizations using the affected Helidon version may face legal or regulatory penalties if data breaches occur due to this issue.

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 firewalls or network segmentation. Monitor for unusual HTTP traffic patterns or unauthorized data access attempts.

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