CVE-2026-101579

Deferred Deferred - Pending Action

Unauthenticated Data Access in Helidon via HTTP/2

Publication date: 2026-10-20

Last updated on: 2026-11-06

Assigner: Oracle

Description

Vulnerability in the Helidon product of Oracle Fusion Middleware (component: helidon-grpc-server). Supported versions that are affected are 3.0.0-3.2.21. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP/2 to compromise Helidon. While the vulnerability is in Helidon, attacks may significantly impact additional products (scope change). 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. CVSS 3.1 Base Score 7.2 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N).

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Meta Information

Published

2026-10-20

Last Modified

2026-11-06

Generated

2026-11-10

AI Q&A

2026-10-21

EPSS Evaluated

2026-11-08

NVD

CVE-2026-101579

EUVD

EUVD-2026-105987

Affected Vendors & Products

Vendor	Product	Version / Range
Oracle Corporation	Helidon	3.0.0

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 vulnerability affects Oracle Fusion Middleware's Helidon product, specifically the helidon-grpc-server component. It impacts versions 3.0.0 through 3.2.21. An unauthenticated attacker can exploit it remotely via HTTP/2 to gain unauthorized access to data, including read, update, insert, or delete operations on some Helidon accessible data.

Impact Analysis

An attacker could access, modify, or delete sensitive data within the Helidon system. Since Helidon is part of Oracle Fusion Middleware, attacks may also impact other connected products. The vulnerability allows unauthorized data access without authentication, posing risks to data integrity and confidentiality.

Compliance Impact

This vulnerability could lead to unauthorized data access or modification, violating GDPR's data protection principles or HIPAA's security requirements for protected health information. Non-compliance may result in legal penalties, reputational damage, or loss of trust.

Mitigation Strategies

Upgrade Helidon to a version later than 3.2.21. If immediate upgrade is not possible, restrict network access to HTTP/2 ports and apply network-level mitigations such as firewalls or WAF rules to block unauthorized access.

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