CVE-2026-87289

Analyzed Analyzed - Analysis Complete

Denial of Service in Oracle Helidon

Publication date: 2026-09-15

Last updated on: 2026-09-25

Assigner: Oracle

Description

Vulnerability in the Helidon product of Oracle Fusion Middleware (component: helidon-webserver-static-content). Supported versions that are affected are 4.0.0-4.5.4. 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

2026-09-15

Last Modified

2026-09-25

Generated

2026-10-06

AI Q&A

2026-09-16

EPSS Evaluated

2026-10-04

NVD

CVE-2026-87289

EUVD

EUVD-2026-79938

Affected Vendors & Products

Vendor	Product	Version / Range
oracle	helidon	From 4.0.0 (inc) to 4.5.4 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-400	The product does not properly control the allocation and maintenance of a limited resource.

Attack-Flow Graph

Executive Summary

This is a denial-of-service (DoS) vulnerability in Oracle Helidon's web server static content component. It allows unauthenticated attackers to remotely crash the server by sending specially crafted HTTP requests, causing repeated crashes or hangs.

Detection Guidance

Detect this vulnerability by checking if your Helidon webserver version is between 4.0.0 and 4.5.4. Use commands like 'java -jar helidon.jar --version' or inspect dependency files (pom.xml, build.gradle) for affected versions.

Impact Analysis

If exploited, this vulnerability can disrupt services by making the Helidon server unavailable, leading to downtime for applications relying on it. It does not allow data theft or modification, only service interruption.

Compliance Impact

This DoS vulnerability may impact compliance by causing service unavailability, which could violate availability requirements in GDPR (Article 32) and HIPAA (Security Rule). Organizations must ensure timely patching to maintain compliance.

Mitigation Strategies

Upgrade Helidon to a version beyond 4.5.4 immediately. If upgrading is not possible, restrict network access to the Helidon webserver via firewall rules or disable the static content feature until patched.

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