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

This vulnerability resides in the Imperative Web Server component of Oracle Helidon. An attacker who can reach the service over HTTP need not be authenticated to issue requests that modify, insert, delete or read data that should be protected, and can also trigger a partial denial of service. The flaw represents an authorization bypass (CWE-284) and affects confidentiality, integrity, and availability at a high severity level according to the specified CVSS vector. The vulnerability affects Helidon versions 4.0.0 to 4.4.1.

Affected Systems

Oracle Helidon versions 4.0.0 to 4.4.1 are affected. The product is part of Oracle Fusion Middleware and typically runs as a web server component in enterprise Java environments.

Risk and Exploitability

The CVSS v3.1 base score of 7.3 indicates high severity. The EPSS score of < 1% shows a very low yet non-zero likelihood of exploitation, and the vulnerability is not listed in CISA KEV. Because the attack only requires unauthenticated HTTP traffic, the potential for abuse is easy to satisfy, making the risk significant if not promptly mitigated.

Generated by OpenCVE AI on August 28, 2026 at 21:50 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Upgrade Oracle Helidon to the latest patched version that addresses CVE-2026-73894.
  • If upgrading immediately is not feasible, block external HTTP traffic to the Helidon service until a fix is available.
  • Verify that authentication and authorization controls are correctly enforced so that only authenticated sessions can perform data modification or access privileged data.

Generated by OpenCVE AI on August 28, 2026 at 21:50 UTC.

Tracking

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Advisories

No advisories yet.

History

Fri, 28 Aug 2026 22:15:00 +0000

Type Values Removed Values Added
Title Helidon Unauthorized Data Modification via HTTP

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 22:15:00 +0000

Type Values Removed Values Added
Title Unauthenticated HTTP Authorization Bypass Allowing Data Modification in Oracle Helidon

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

Type Values Removed Values Added
Title Unauthenticated HTTP Authorization Bypass Allowing Data Modification in Oracle Helidon

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

Type Values Removed Values Added
Title Unauthenticated HTTP Access Allows Unauthorized Data Modification and Partial Denial of Service in Oracle Helidon 4.5.0

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 Access Allows Unauthorized Data Modification and Partial Denial of Service in Oracle Helidon 4.5.0
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 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: 2026-08-28T17:30:55.706Z

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

Link: CVE-2026-73894

cve-icon Vulnrichment

Updated: 2026-08-19T12:08:18.569Z

cve-icon NVD

Status : Modified

Published: 2026-08-18T21:18:21.983

Modified: 2026-08-28T20:19:48.530

Link: CVE-2026-73894

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-28T22:00:15Z

Weaknesses