Description
Vulnerability in the Helidon product of Oracle Fusion Middleware (component: Imperative Web Server). Supported versions that are affected are 4.0.0-4.5.2. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP 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 and unauthorized ability to cause a partial denial of service (partial DOS) of Helidon. CVSS 3.1 Base Score 8.3 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L).
Published: 2026-08-18
Score: 8.3 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

Oracle Helidon versions 4.0.0‑4.5.2 contain a flaw in the Imperative Web Server that permits an unauthenticated attacker with network access to the HTTP interface to modify, read, or delete data exposed by the service and to trigger a partial denial of service. The vulnerability, which has a very low EPSS score but an 8.3 CVSS base score, also carries a scope change that may affect other Oracle products that depend on the Helidon engine. These capabilities compromise confidentiality, integrity, and availability for users of the affected Helidon deployments.

Affected Systems

Helidon versions 4.0.0 through 4.5.2, released by Oracle Corporation.

Risk and Exploitability

This flaw is scored 8.3 on CVSS v3.1 with an attack vector of network and no authentication required. The EPSS score is < 1% and the vulnerability is not listed in the CISA KEV catalog. The vulnerability’s scope change indicates that it may also pose a threat to additional Oracle products. Based on the description, it is likely exploitable by any entity that can reach the Helidon HTTP endpoint, making the risk high for exposed systems. No known mitigations outside of applying the vendor patch are mentioned in the advisory.

Generated by OpenCVE AI on August 28, 2026 at 19:42 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Apply the latest Oracle Helidon patch for version 4.5.3 to remove the web server flaw.
  • Restrict inbound HTTP traffic to Helidon to trusted IP ranges using firewall rules or network segmentation.
  • Enable logging for Helidon and monitor for anomalous update, insert, delete, or denial-of-service activity.

Generated by OpenCVE AI on August 28, 2026 at 19:42 UTC.

Tracking

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Advisories

No advisories yet.

History

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

Type Values Removed Values Added
Title Unauthenticated HTTP Exploit Enables Data Manipulation and Partial Denial of Service in Oracle Helidon 4.5.3

Fri, 28 Aug 2026 05:00:00 +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 4.5.3. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP 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 and unauthorized ability to cause a partial denial of service (partial DOS) of Helidon. CVSS 3.1 Base Score 8.3 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/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 4.0.0-4.5.2. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP 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 and unauthorized ability to cause a partial denial of service (partial DOS) of Helidon. CVSS 3.1 Base Score 8.3 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L).
CPEs cpe:2.3:a:oracle:helidon:*:*:*:*:*:*:*:*

Thu, 20 Aug 2026 14:45:00 +0000

Type Values Removed Values Added
Title Unauthenticated HTTP Exploit Enables Data Manipulation and Partial Denial of Service in Oracle Helidon 4.5.3

Wed, 19 Aug 2026 17:15:00 +0000

Type Values Removed Values Added
Title Unauthenticated HTTP Remote Access in Oracle Helidon 4.5.3 Allows Unauthorized Data Modification
Weaknesses CWE-200

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 07:00:00 +0000

Type Values Removed Values Added
Title Unauthenticated HTTP Remote Access in Oracle Helidon 4.5.3 Allows Unauthorized Data Modification
Weaknesses CWE-200
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 4.5.3. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP 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 and unauthorized ability to cause a partial denial of service (partial DOS) of Helidon. CVSS 3.1 Base Score 8.3 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L).
First Time appeared Oracle
Oracle helidon
CPEs cpe:2.3:a:oracle:helidon:4.5.3:*:*:*:*:*:*:*
Vendors & Products Oracle
Oracle helidon
References
Metrics cvssV3_1

{'score': 8.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L'}

Subscriptions

Oracle Helidon
cve-icon MITRE

Status: PUBLISHED

Assigner: oracle

Published:

Updated: 2026-08-28T04:27:42.568Z

Reserved: 2026-08-13T18:41:45.891Z

Link: CVE-2026-73931

cve-icon Vulnrichment

Updated: 2026-08-19T12:07:55.541Z

cve-icon NVD

Status : Modified

Published: 2026-08-18T21:18:26.113

Modified: 2026-08-28T05:16:45.727

Link: CVE-2026-73931

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-28T19:45:03Z

Weaknesses