CVE-2026-73933

Modified Modified - Updated After Analysis

Unauthenticated Data Access 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 update, insert or delete access to some of Helidon accessible data as well as unauthorized read access to a subset of Helidon accessible data and unauthorized ability to cause a partial denial of service (partial DOS) of Helidon. CVSS 3.1 Base Score 7.3 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L).

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-2026-73933

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 unauthenticated attackers to exploit it via HTTP network access. Successful exploitation can lead to unauthorized data access, modification, or deletion, as well as partial denial of service.

Detection Guidance

Detecting this vulnerability requires checking if your system is running Oracle Helidon version 4.5.3. Use commands like 'java -jar helidon.jar --version' or check application logs for Helidon framework version. Network scanning tools like Nmap can identify Helidon services on HTTP ports.

Impact Analysis

An attacker could read, modify, or delete some data in Helidon, disrupt service availability, or cause partial system outages. Since it requires network access, external threats are the primary concern.

Compliance Impact

This vulnerability could impact compliance with GDPR and HIPAA by allowing unauthorized access to sensitive data, potentially leading to data breaches. Unauthorized read access and data manipulation may violate confidentiality and integrity requirements under these regulations.

Mitigation Strategies

Immediately upgrade Helidon to a patched version above 4.5.3. If upgrading is not possible, restrict network access to Helidon services via firewalls or disable HTTP interfaces. Monitor for unusual activity and apply Oracle's security patches as soon as available.

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