CVE-2026-73879

Modified Modified - Updated After Analysis

Unauthenticated Data Modification 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 creation, deletion or modification access to critical data or all Helidon accessible data. CVSS 3.1 Base Score 7.5 (Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/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-2026-73879

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 manipulate critical data through HTTP requests.

Detection Guidance

Since this is a vulnerability in Oracle Helidon's Imperative Web Server, check if your system is running Helidon version 4.5.1. Use commands like 'curl -I http://<target>:<port>' to inspect server headers for Helidon version details. Network scans with tools like Nmap may also identify vulnerable services.

Impact Analysis

An attacker could exploit this to create, delete, or modify data without authentication. This could lead to data breaches, loss of sensitive information, or system compromise if Helidon is used in your environment.

Compliance Impact

This vulnerability could lead to unauthorized data access or modification, violating GDPR's integrity and confidentiality requirements or HIPAA's safeguards for protected health information. Non-compliance risks fines and legal penalties.

Mitigation Strategies

Upgrade Helidon to a version beyond 4.5.1 immediately. If upgrading is not possible, restrict network access to the Imperative Web Server via firewalls or disable the service if unused. Apply Oracle's official patches as soon as they are released.

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