Description
Vulnerability in the Helidon product of Oracle Fusion Middleware (component: Imperative Web Server). Supported versions that are affected are 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 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).
Published: 2026-08-18
Score: 7.3 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

Helidon contains an unauthenticated HTTP access control weakness that allows a network‑connected attacker to update, insert, delete, or read some Helidon data and cause a partial denial of service. This flaw results from missing authorization checks in the Imperative Web Server component and is classified as an Access Control weakness (CWE‑284). The impact includes confidentiality, integrity, and availability compromise, potentially corrupting data and disrupting service.

Affected Systems

The affected product is Oracle Helidon versions 4.0.0-4.4.1. No other releases are reported as vulnerable. Operators should confirm they are running one of these releases and that a newer patch has not already been applied.

Risk and Exploitability

The CVSS 3.1 base score of 7.3 indicates moderate severity, while the EPSS score of <1% suggests a low likelihood of exploitation at present. The vulnerability is not listed in CISA’s KEV catalog. Attackers can exploit it remotely over HTTP from any host that can reach the Helidon instance without authentication.

Generated by OpenCVE AI on August 28, 2026 at 23:39 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Apply the official Oracle patch for Helidon versions 4.0.0-4.4.1 as soon as it becomes available.
  • Restrict HTTP access to Helidon services to trusted networks or enforce VPN connectivity to limit exposure.
  • Enable or enforce authentication mechanisms on Helidon endpoints to ensure only authorized users can interact with protected resources.
  • Monitor Helidon logs for patterns of unauthorized data modification or denial‑of‑service activity.
  • If patching cannot be applied immediately, consider deploying a web application firewall to block anomalous requests.

Generated by OpenCVE AI on August 28, 2026 at 23:39 UTC.

Tracking

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Advisories

No advisories yet.

History

Sat, 29 Aug 2026 00:00:00 +0000

Type Values Removed Values Added
Title Unauthenticated HTTP Access Control Vulnerability in Oracle Helidon

Fri, 28 Aug 2026 19:45:00 +0000

Type Values Removed Values Added
Description Vulnerability in the Helidon product of Oracle Fusion Middleware (component: Imperative Web Server). The supported version that is affected is 4.5.0. 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). Vulnerability in the Helidon product of Oracle Fusion Middleware (component: Imperative Web Server). Supported versions that are affected are 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 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).
CPEs cpe:2.3:a:oracle:helidon:*:*:*:*:*:*:*:*

Thu, 20 Aug 2026 14:15:00 +0000

Type Values Removed Values Added
Title Helidon 4.5.0 HTTP Access Control Weakness Allows Unauthorized Data Modification

Thu, 20 Aug 2026 04:45:00 +0000

Type Values Removed Values Added
Title Helidon 4.5.0 HTTP Access Control Weakness Allows Unauthorized Data Modification

Wed, 19 Aug 2026 18:45:00 +0000

Type Values Removed Values Added
Title Unauthenticated HTTP Vulnerability in Oracle Helidon 4.5.0 Allowing Unauthorized Data Modification and Partial Denial of Service
Weaknesses CWE-639

Wed, 19 Aug 2026 13:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Wed, 19 Aug 2026 06:30:00 +0000

Type Values Removed Values Added
Title Unauthenticated HTTP Vulnerability in Oracle Helidon 4.5.0 Allowing Unauthorized Data Modification and Partial Denial of Service
Weaknesses CWE-284
CWE-639

Tue, 18 Aug 2026 21:15:00 +0000

Type Values Removed Values Added
Description Vulnerability in the Helidon product of Oracle Fusion Middleware (component: Imperative Web Server). The supported version that is affected is 4.5.0. 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).
First Time appeared Oracle
Oracle helidon
CPEs cpe:2.3:a:oracle:helidon:4.5.0:*:*:*:*:*:*:*
Vendors & Products Oracle
Oracle helidon
References
Metrics cvssV3_1

{'score': 7.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L'}

Subscriptions

Oracle Helidon
cve-icon MITRE

Status: PUBLISHED

Assigner: oracle

Published:

Updated: 2026-08-28T17:25:19.536Z

Reserved: 2026-08-13T18:41:45.884Z

Link: CVE-2026-73891

cve-icon Vulnrichment

Updated: 2026-08-19T12:08:21.748Z

cve-icon NVD

Status : Modified

Published: 2026-08-18T21:18:21.650

Modified: 2026-08-28T20:19:47.870

Link: CVE-2026-73891

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-28T23:45:03Z

Weaknesses