CVE-2026-73932

Modified Modified - Updated After Analysis

Denial of Service 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 4.0.0-4.5.2. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Helidon. Successful attacks of this vulnerability can result in unauthorized ability to cause a partial denial of service (partial DOS) of Helidon. CVSS 3.1 Base Score 5.3 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L).

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-2026-73932

Affected Vendors & Products

Vendor	Product	Version / Range
oracle	helidon	4.5.3

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 4.5.3 and allows an unauthenticated attacker to cause a partial denial of service (DOS) by sending crafted HTTP requests over the network.

Detection Guidance

To detect this vulnerability, check if your system is running Helidon version 4.5.3. Use commands like 'java -jar helidon.jar --version' or inspect application logs for Helidon framework references. Monitor network traffic for HTTP requests targeting Helidon services.

Impact Analysis

An attacker could exploit this to disrupt the availability of the Helidon server, leading to degraded performance or temporary outages. This may affect applications relying on the server for web services or APIs.

Compliance Impact

This vulnerability causes partial denial of service in Helidon, which could disrupt availability of services. While not directly impacting data confidentiality or integrity, prolonged unavailability may violate compliance requirements for availability in standards like GDPR or HIPAA.

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 firewalls or network segmentation to limit exposure.

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