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

Vulnerability in the Helidon product of Oracle Fusion Middleware, specifically the Imperative Web Server component, allows an unauthenticated attacker with network access via HTTP to compromise Helidon. The flaw, present in versions 4.0.0 through 4.5.2, can be exploited to perform unauthorized updates, inserts, deletes, and reads of Helidon data, as well as to trigger a partial denial of service. The weakness is due to improper access control (CWE‑284).

Affected Systems

Affected systems include Oracle Helidon versions 4.0.0 through 4.5.2, which are part of Oracle Fusion Middleware. Any deployment using these versions across enterprises that utilize Helidon for web services is at risk.

Risk and Exploitability

The CVSS v3.1 base score of 8.3 indicates a high severity, while the EPSS score is <1%. The vulnerability is not listed in the CISA KEV catalog yet. Attackers can exploit the flaw without authentication and only require standard HTTP network access; however, the EPSS score indicates a low likelihood of exploitation. The known scope change may also affect additional Oracle products, heightening the overall risk.

Generated by OpenCVE AI on August 28, 2026 at 19:43 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Apply the official patch or upgrade Helidon to a later version (e.g., 4.5.3 or newer) as announced in Oracle's security advisory.
  • Restrict Helidon HTTP exposure by configuring firewalls or VPNs so only trusted IP ranges can reach the service.
  • Enable comprehensive logging on Helidon and continuously monitor for unexpected data changes or denial of service patterns.
  • Stay informed by regularly reviewing Oracle's security advisories and applying any future patches promptly.

Generated by OpenCVE AI on August 28, 2026 at 19:43 UTC.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

History

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

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

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 19:45:00 +0000

Type Values Removed Values Added
Title Unauthenticated HTTP Access Allows Data Tampering and Partial Denial of Service in Oracle Helidon 4.5.3

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

Type Values Removed Values Added
Title Unauthenticated HTTP Access Allows Data Tampering and Partial Denial of Service in Oracle Helidon 4.5.3

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

Type Values Removed Values Added
Title Helidon unauthorized HTTP access allows data tampering and partial denial of service

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 Helidon unauthorized HTTP access allows data tampering and partial denial of service
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 4.5.3. 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: 2026-08-28T04:23:41.084Z

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

Link: CVE-2026-73929

cve-icon Vulnrichment

Updated: 2026-08-19T12:08:01.683Z

cve-icon NVD

Status : Modified

Published: 2026-08-18T21:18:25.890

Modified: 2026-08-28T05:16:45.610

Link: CVE-2026-73929

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

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

Weaknesses