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 takeover of Helidon. CVSS 3.1 Base Score 9.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
Published: 2026-08-18
Score: 9.8 Critical
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

A missing authorization flaw (CWE-284) in Oracle Helidon’s Imperative Web Server permits an unauthenticated attacker to send a crafted HTTP request and gain the ability to run arbitrary code. The vulnerability arises from improper access control checks on HTTP endpoints, allowing remote code execution without credentials. Consequences include full compromise of the Helidon service, exposing all data and services it handles, and potentially a pivot to other network resources.

Affected Systems

Helidon versions 4.0.0 through 4.4.1 are vulnerable. The issue exists in the Imperative Web Server component of these releases. The latest release, 4.5.0, includes the necessary fix and should be adopted if available.

Risk and Exploitability

The EPSS score is below 1 %, indicating the attack likelihood is presently very low, yet the CVSS 3.1 base score of 9.8 highlights the catastrophic impact of a successful exploit. The flaw is easily triggered remotely via a simple HTTP request, requiring no authentication. The vulnerability is not listed in the CISA KEV catalog, but its severity warrants immediate attention to prevent potential compromise.

Generated by OpenCVE AI on August 28, 2026 at 20:23 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Apply the latest Oracle Helidon patch that addresses the 4.0.0‑4.4.1 vulnerability or upgrade to Helidon 4.5.0 or later
  • Restrict network access to Helidon by allowing HTTP traffic only from trusted IP ranges or via firewall rules
  • Enable comprehensive logging and monitor logs for suspicious or repeated HTTP requests to the vulnerable endpoint

Generated by OpenCVE AI on August 28, 2026 at 20:23 UTC.

Tracking

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Advisories

No advisories yet.

History

Fri, 28 Aug 2026 20:45:00 +0000

Type Values Removed Values Added
Title Helidon Unauthenticated HTTP Remote Code Execution Vulnerability

Thu, 27 Aug 2026 18:00:00 +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 takeover of Helidon. CVSS 3.1 Base Score 9.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H). 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 takeover of Helidon. CVSS 3.1 Base Score 9.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
CPEs cpe:2.3:a:oracle:helidon:*:*:*:*:*:*:*:*

Thu, 20 Aug 2026 19:45:00 +0000

Type Values Removed Values Added
Title Helidon 4.5.0 Unauthenticated HTTP Exploit Allows Service Takeover

Thu, 20 Aug 2026 07:15:00 +0000

Type Values Removed Values Added
Title Helidon 4.5.0 Unauthenticated HTTP Exploit Allows Service Takeover

Wed, 19 Aug 2026 18:30:00 +0000

Type Values Removed Values Added
Title Unauthenticated HTTP Exploit in Oracle Helidon 4.5.0 Enables Remote Code Execution

Wed, 19 Aug 2026 15:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

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

Wed, 19 Aug 2026 07:00:00 +0000

Type Values Removed Values Added
Title Unauthenticated HTTP Exploit in Oracle Helidon 4.5.0 Enables Remote Code Execution
Weaknesses CWE-284

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 takeover of Helidon. CVSS 3.1 Base Score 9.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
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': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

Subscriptions

Oracle Helidon
cve-icon MITRE

Status: PUBLISHED

Assigner: oracle

Published:

Updated: 2026-08-27T21:38:21.181Z

Reserved: 2026-08-13T18:41:45.887Z

Link: CVE-2026-73912

cve-icon Vulnrichment

Updated: 2026-08-19T14:04:25.976Z

cve-icon NVD

Status : Modified

Published: 2026-08-18T21:18:24.027

Modified: 2026-08-28T00:18:11.807

Link: CVE-2026-73912

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-28T20:30:08Z

Weaknesses