CVE-2026-73870

Modified Modified - Updated After Analysis

Unauthenticated Data Access in Oracle 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 require human interaction from a person other than the attacker and 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 6.1 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/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-2026-73870

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 vulnerability affects Oracle Fusion Middleware's Helidon product, specifically version 4.5.0. It allows an unauthenticated attacker to remotely access and manipulate data through the Imperative Web Server component via HTTP. Exploitation requires user interaction and could impact other connected systems.

Detection Guidance

Since this is a vulnerability in Oracle Helidon's Imperative Web Server, detection involves checking for vulnerable versions and exposed HTTP endpoints. Verify if Helidon 4.5.0 is running by inspecting server logs or process lists. Use network scanning tools like nmap to identify open HTTP ports (e.g., nmap -p 80,443 <target>). Check for unusual HTTP requests or responses that may indicate exploitation attempts.

Impact Analysis

An attacker could read or modify some of your Helidon-accessible data without authentication. This may lead to unauthorized changes, data leaks, or further compromise of systems relying on Helidon. User interaction is required for exploitation.

Compliance Impact

This vulnerability could lead to unauthorized data access or modification, violating GDPR's data protection principles or HIPAA's security requirements. Compliance may be compromised if sensitive data is exposed or altered.

Mitigation Strategies

Update Helidon to a version that is not affected by this vulnerability. If immediate update is not possible, restrict network access to the Imperative Web Server component and monitor for unusual activity.

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