CVE-2026-73921: 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. in Oracle Corporation Helidon
CVE-2026-73921 is a critical vulnerability in Oracle Helidon version 1.4.20 that allows an unauthenticated attacker with network access via HTTP to fully compromise the product. The vulnerability has a CVSS 3.1 base score of 9.8, indicating high impact on confidentiality, integrity, and availability. Successful exploitation can lead to complete takeover of the Helidon instance. Oracle has included this vulnerability in its August 2026 Critical Security Patch Update, which provides patches for affected versions including 1.4.20.
AI Analysis
Technical Summary
This vulnerability affects Oracle Helidon version 1.4.20, specifically in the Imperative Web Server component. It is easily exploitable remotely without authentication over HTTP, allowing attackers to compromise the system completely. The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H) reflects network attack vector, low attack complexity, no privileges or user interaction required, and high impact on confidentiality, integrity, and availability. Oracle has published a Critical Security Patch Update in August 2026 that addresses this and other vulnerabilities across multiple products, including Helidon 1.4.20.
Potential Impact
An unauthenticated attacker with network access can exploit this vulnerability to take over the Helidon server, resulting in full compromise of confidentiality, integrity, and availability of the affected system. This can lead to unauthorized data access, modification, and service disruption.
Mitigation Recommendations
Oracle has released patches for Helidon version 1.4.20 as part of the August 2026 Critical Security Patch Update. Users should apply the official Oracle patches promptly to remediate this vulnerability. Oracle strongly recommends staying on actively supported versions and applying security patches without delay. Patch status is confirmed by the vendor advisory.
CVE-2026-73921: 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. in Oracle Corporation Helidon
Description
CVE-2026-73921 is a critical vulnerability in Oracle Helidon version 1.4.20 that allows an unauthenticated attacker with network access via HTTP to fully compromise the product. The vulnerability has a CVSS 3.1 base score of 9.8, indicating high impact on confidentiality, integrity, and availability. Successful exploitation can lead to complete takeover of the Helidon instance. Oracle has included this vulnerability in its August 2026 Critical Security Patch Update, which provides patches for affected versions including 1.4.20.
CVSS v3.1
Score 9.8critical
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability affects Oracle Helidon version 1.4.20, specifically in the Imperative Web Server component. It is easily exploitable remotely without authentication over HTTP, allowing attackers to compromise the system completely. The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H) reflects network attack vector, low attack complexity, no privileges or user interaction required, and high impact on confidentiality, integrity, and availability. Oracle has published a Critical Security Patch Update in August 2026 that addresses this and other vulnerabilities across multiple products, including Helidon 1.4.20.
Potential Impact
An unauthenticated attacker with network access can exploit this vulnerability to take over the Helidon server, resulting in full compromise of confidentiality, integrity, and availability of the affected system. This can lead to unauthorized data access, modification, and service disruption.
Mitigation Recommendations
Oracle has released patches for Helidon version 1.4.20 as part of the August 2026 Critical Security Patch Update. Users should apply the official Oracle patches promptly to remediate this vulnerability. Oracle strongly recommends staying on actively supported versions and applying security patches without delay. Patch status is confirmed by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- oracle
- Date Reserved
- 2026-08-13T18:41:45.889Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://www.oracle.com/security-alerts/cspuaug2026.html","vendor":"Oracle"}]
Threat ID: 6a84cceec6e8be0332c397ee
Added to database: 08/18/2026, 21:21:50 UTC
Last enriched: 08/18/2026, 21:37:10 UTC
Last updated: 08/19/2026, 04:27:51 UTC
Views: 8
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