CVE-2026-73904

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. 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-2026-73904

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 data via HTTP. The impact includes unauthorized read, update, insert, or delete access to some Helidon data.

Detection Guidance

Detection involves checking for vulnerable versions of Oracle Helidon 4.5.1. Use commands like 'curl -v http://[target]:[port]/' to inspect server responses. Verify installed versions with 'java -jar helidon.jar --version' if applicable. Monitor network traffic for unusual HTTP requests targeting Helidon services.

Impact Analysis

An attacker could exploit this to access sensitive data, alter information, or delete records without authentication. This could lead to data breaches, loss of integrity, or unauthorized modifications to critical systems.

Compliance Impact

This vulnerability could lead to unauthorized data access or modification, violating GDPR's data protection principles or HIPAA's security requirements. Non-compliance may result in legal penalties, fines, or reputational damage.

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 firewall rules or disable HTTP access until patched.

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