CVE-2026-73878

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 3.0.0-3.2.17. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Helidon. Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all Helidon accessible data. CVSS 3.1 Base Score 7.5 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N).

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-2026-73878

Affected Vendors & Products

Vendor	Product	Version / Range
oracle	helidon	3.2.18

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-200	The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.

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 3.2.18 and allows unauthenticated attackers to exploit it via HTTP network access. Successful exploitation can lead to unauthorized access to critical or all accessible data in Helidon.

Detection Guidance

This vulnerability affects Oracle Helidon 3.2.18 via the Imperative Web Server component. Detection requires checking the installed version of Helidon. Use commands like 'java -jar helidon.jar --version' or inspect application logs for Helidon startup messages. If version 3.2.18 is detected, the system is vulnerable.

Impact Analysis

If you use the affected Helidon version, an attacker could gain access to sensitive data stored or processed by the Imperative Web Server. This may include confidential information, leading to data breaches or unauthorized disclosures.

Compliance Impact

This vulnerability could lead to unauthorized data access, violating GDPR's data protection principles or HIPAA's security requirements. Non-compliance may result in legal penalties, fines, or reputational damage due to exposed sensitive data.

Mitigation Strategies

Upgrade Helidon to a version later than 3.2.18 as soon as possible to address the vulnerability. If immediate upgrade is not feasible, restrict network access to the Imperative Web Server component via firewall rules or network segmentation to limit exposure.

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