CVE-2026-73899

Modified Modified - Updated After Analysis

Unauthenticated 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 3.0.0-3.2.18. 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

2026-09-07

NVD

CVE-2026-73899

Affected Vendors & Products

Vendor	Product	Version / Range
oracle	helidon	3.2.19

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 3.2.19 and allows unauthenticated attackers to access some data via HTTP requests. The impact is limited to unauthorized read access to a subset of accessible data.

Detection Guidance

To detect this vulnerability, scan for Oracle Helidon 3.2.19 instances exposed via HTTP. Use network scanning tools like Nmap to identify services running on typical Helidon ports (e.g., 8080, 8443). Check server banners or HTTP responses for Helidon version details. Example Nmap command: nmap -sV --script=http-title <target_IP>. Verify if the version matches 3.2.19.

Impact Analysis

An attacker could exploit this to read sensitive data from the Helidon server without needing credentials. This could lead to exposure of confidential information, though the scope is limited to data accessible through the web server.

Compliance Impact

This vulnerability could lead to unauthorized data access, which may violate GDPR (data protection) and HIPAA (health data privacy) requirements. Organizations using affected Helidon versions must assess potential compliance risks and apply mitigations.

Mitigation Strategies

Immediately upgrade Oracle Helidon to a version later than 3.2.19. If upgrading is not possible, restrict network access to Helidon ports using firewalls or disable the Imperative Web Server component. Apply network-level controls to block unauthorized HTTP access. Monitor for suspicious activity targeting Helidon services.

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