CVE-2026-73877

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. 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

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-2026-73877

Affected Vendors & Products

Vendor	Product	Version / Range
oracle	helidon	3.2.18

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 3.2.18 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

Since this is a vulnerability in Oracle Helidon's Imperative Web Server, detection involves checking for affected versions and exposed HTTP endpoints. Verify if Helidon 3.2.18 is running on your system. Use network scanning tools like nmap to identify HTTP services on standard ports (e.g., 8080). Check server logs for unusual access patterns or requests targeting Helidon endpoints.

Impact Analysis

An attacker could exploit this to read sensitive data from the Helidon server without authentication. This may lead to exposure of confidential information, though not full system compromise.

Compliance Impact

This vulnerability could lead to unauthorized data access, violating GDPR's data protection principles and HIPAA's security requirements for protected health information. Organizations must address it to maintain compliance.

Mitigation Strategies

Upgrade Helidon to a version later than 3.2.18 as it is affected by this vulnerability. Apply any available patches or updates from Oracle immediately.

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