CVE-2026-73874

Modified Modified - Updated After Analysis

Unauthorized Data Access in Helidon via HTTP

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 low privileged 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 5.4 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/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-2026-73874

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 is a vulnerability in Oracle Fusion Middleware's Helidon product, specifically in the Imperative Web Server component. It affects version 4.5.0 and allows a low-privileged attacker with network access via HTTP to compromise the system. The vulnerability enables unauthorized data access and modifications, including read, update, insert, or delete operations on some Helidon accessible data.

Detection Guidance

Detection of CVE-2026-73874 in Helidon 4.5.0 requires checking for vulnerable versions and monitoring HTTP traffic for exploitation attempts. Inspect installed Helidon versions using package managers like Maven or check application logs for Imperative Web Server errors. Network scans for open HTTP ports (typically 8080) may reveal exposed instances.

Impact Analysis

If exploited, this vulnerability could allow attackers to access or modify sensitive data within the Helidon system. This may lead to data breaches, unauthorized changes to critical information, or potential disruption of services relying on the Imperative Web Server component.

Compliance Impact

This vulnerability allows unauthorized read and limited write access to data, which could lead to unauthorized exposure or modification of sensitive information. This may violate compliance requirements under GDPR (data confidentiality) and HIPAA (protected health information integrity).

Mitigation Strategies

Apply the latest security patches or updates for Oracle Helidon version 4.5.0. If patches are unavailable, consider upgrading to a newer, supported version. Restrict network access to the Imperative Web Server component and monitor HTTP traffic for suspicious activity.

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