CVE-2026-71157

Modified Modified - Updated After Analysis

Information Disclosure in Oracle 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 and 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 read access to a subset of Helidon accessible data. CVSS 3.1 Base Score 5.3 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N).

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

2026-09-07

NVD

CVE-2026-71157

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 is a vulnerability in Oracle Fusion Middleware's Helidon product, specifically in the Imperative Web Server component. It affects version 4.5.0 and allows unauthenticated attackers to access some data via HTTP requests. The impact is limited to unauthorized read access to a subset of accessible data.

Detection Guidance

Detecting this vulnerability requires checking for vulnerable versions of Oracle Helidon 4.5.0. Inspect your system for Helidon installations and verify the version. Use commands like 'find / -name *helidon* 2>/dev/null' to locate Helidon files or packages. Check application logs for HTTP requests targeting Helidon endpoints.

Impact Analysis

An attacker could exploit this to read sensitive data from the Helidon server without needing credentials. This may lead to exposure of confidential information, though the scope is limited to data the server can access.

Compliance Impact

This vulnerability could lead to unauthorized data access, potentially violating GDPR (data protection) or HIPAA (health information privacy) if sensitive data is exposed. Organizations must assess the risk of data leakage and implement mitigations.

Mitigation Strategies

Upgrade Oracle Helidon to a version later than 4.5.0 immediately. If upgrading is not possible, apply network-level mitigations such as restricting HTTP access to Helidon endpoints using firewalls or disabling the Imperative Web Server component if unused. Monitor for unusual HTTP traffic patterns.

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