CVE-2026-73915

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 4.0.0-4.4.1. 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 hang or frequently repeatable crash (complete DOS) of Helidon. CVSS 3.1 Base Score 7.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

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-2026-73915

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 vulnerability affects Oracle Fusion Middleware's Helidon product, specifically version 4.5.0. It allows an unauthenticated attacker to remotely exploit the Imperative Web Server component via HTTP, causing a denial of service (DOS) by hanging or crashing the system repeatedly.

Detection Guidance

To detect this vulnerability, check if your system is running Helidon version 4.5.0. Use commands like 'java -jar helidon.jar --version' or inspect application logs for Helidon startup messages. Network scanning tools can identify exposed HTTP endpoints.

Impact Analysis

If exploited, this vulnerability can disrupt the availability of the Helidon server, leading to downtime and preventing legitimate users from accessing services. It does not allow data theft or modification but can severely impact service reliability.

Compliance Impact

This vulnerability causes a denial of service (DOS) in Oracle Helidon, leading to system unavailability. Compliance with standards like GDPR and HIPAA requires maintaining data availability and integrity, which this vulnerability directly threatens by causing frequent crashes or hangs.

Mitigation Strategies

Upgrade Helidon to a version unaffected by this vulnerability. If immediate upgrade is not possible, restrict network access to Helidon via firewalls or disable HTTP interfaces. Monitor for unusual traffic patterns indicating exploitation attempts.

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