CVE-2026-73871

Modified Modified - Updated After Analysis

Unauthorized Data Read 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 3.0.0-3.2.17. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Helidon. Successful attacks of this vulnerability can result in unauthorized read access to a subset of Helidon accessible data. CVSS 3.1 Base Score 5.3 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/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-2026-73871

Affected Vendors & Products

Vendor	Product	Version / Range
oracle	helidon	3.2.18

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 3.2.18. It allows an unauthenticated attacker to remotely access the Imperative Web Server component via HTTP. The attack can lead to unauthorized read access to a subset of Helidon's accessible data.

Detection Guidance

Detecting this vulnerability requires checking for vulnerable versions of Oracle Helidon 3.2.18. Inspect your Helidon server logs for HTTP requests targeting the Imperative Web Server component. Use network scanning tools like Nmap to identify Helidon services running on default ports (e.g., 8080, 8443). Verify installed Helidon versions via package managers (e.g., Maven, Gradle) or application logs.

Impact Analysis

An attacker could exploit this to read sensitive data from the Helidon server without authentication. This may include confidential information stored or processed by the application, potentially leading to data breaches or further attacks.

Compliance Impact

This vulnerability could lead to unauthorized data access, violating GDPR's data protection principles or HIPAA's security requirements for protected health information. Organizations may face compliance violations, fines, or legal consequences if exploited.

Mitigation Strategies

Upgrade Oracle Helidon to a version later than 3.2.18 immediately. Apply network-level mitigations such as restricting HTTP access to trusted IPs via firewalls. Disable or remove the Imperative Web Server component if not required. Monitor for unusual read access patterns in logs.

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