CVE-2026-73939

Modified Modified - Updated After Analysis

Unauthenticated Data Manipulation 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 3.0.0-3.2.19. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Helidon. While the vulnerability is in Helidon, attacks may significantly impact additional products (scope change). 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 8.6 (Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/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-2026-73939

Affected Vendors & Products

Vendor	Product	Version / Range
oracle	helidon	3.2.20

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 3.2.20 and allows unauthenticated attackers to exploit it via HTTP network access. The flaw enables unauthorized creation, deletion, or modification of critical data or all accessible Helidon data.

Detection Guidance

Detecting this vulnerability requires checking for vulnerable versions of Oracle Helidon 3.2.20. Inspect installed Helidon packages using commands like 'java -jar helidon.jar --version' or checking package managers (e.g., 'dpkg -l | grep helidon' on Debian or 'rpm -qa | grep helidon' on RPM-based systems). Monitor network traffic for HTTP requests targeting Helidon services.

Impact Analysis

An attacker could exploit this to alter or delete sensitive data, leading to data loss or corruption. Since the scope changes, other products relying on Helidon may also be affected, potentially disrupting services or exposing additional systems.

Compliance Impact

This vulnerability could lead to unauthorized data modification or deletion, violating integrity requirements in GDPR and HIPAA. Non-compliance may result in legal penalties, data breach notifications, and reputational damage.

Mitigation Strategies

Update Helidon to a version later than 3.2.20 as it addresses the vulnerability. If immediate update is not possible, restrict network access to the Imperative Web Server component via firewalls or network segmentation.

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