CVE-2026-70923 in Helidon
Summary
by MITRE • 08/19/2026
Vulnerability in the Helidon product of Oracle Fusion Middleware (component: Imperative Web Server). The supported version that is affected is 3.2.19. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Helidon. Successful attacks require human interaction from a person other than the attacker and 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. CVSS 3.1 Base Score 6.1 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N).
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Analysis
by VulDB Data Team • 08/19/2026
The identified vulnerability resides within the Imperative Web Server component of Oracle Fusion Middleware Helidon, specifically affecting version 3.2.19. This flaw represents a significant security deficiency in how the web server handles incoming HTTP requests, allowing for unauthorized access to sensitive data and system resources. The core technical issue involves an insufficient validation or authorization check mechanism within the request processing pipeline. When clients send specific HTTP requests, the application fails to properly verify whether the requester has legitimate privileges to perform certain operations on accessible data stores. This architectural weakness enables unauthenticated attackers who have network connectivity via standard HTTP protocols to exploit the flaw and compromise the integrity of the Helidon environment.
The operational impact of this vulnerability is substantial due to its potential for scope change, meaning that while the technical root cause lies within Helidon, successful exploitation can lead to broader consequences across additional products in the Oracle Fusion Middleware ecosystem. The primary risks involve unauthorized read access to a subset of data accessible by Helidon and unauthorized update, insert, or delete operations on other portions of that same dataset. This dual impact on both confidentiality and integrity means that attackers could exfiltrate sensitive information while simultaneously corrupting or destroying critical records. Such actions can lead to severe business disruptions, regulatory non-compliance, and loss of trust among stakeholders who rely on the accuracy and privacy of the stored data.
From a classification perspective, this vulnerability aligns with CWE-269 Improper Privilege Management and potentially CWE-862 Missing Authorization, as the system fails to enforce appropriate access controls for unauthenticated users. The requirement for human interaction from a person other than the attacker suggests that the exploit may rely on social engineering tactics or specific user actions within a web interface, such as clicking a malicious link or submitting a crafted form. This characteristic places it in the context of ATT&CK technique T1566 Phishing if delivered via email or T1078 Valid Accounts if combined with credential theft, although the initial access vector is network-based and unauthenticated. The presence of user interaction as a prerequisite indicates that automated remote exploitation without any victim engagement may not be feasible, which slightly mitigates the risk compared to fully autonomous attacks but does not eliminate it given the ease of crafting deceptive interactions.
The CVSS 3.1 base score of 6.1 reflects these combined factors: network accessibility and low complexity are offset by the need for user interaction and limited availability impact. The vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N) confirms that while confidentiality and integrity are compromised, system availability remains intact in this specific scenario. However, the scope change indicates that the blast radius extends beyond the immediate Helidon instance, potentially affecting downstream services or databases connected to it. This amplifies the severity because a single point of failure can cascade into wider infrastructure compromise.
To mitigate this vulnerability, organizations running Oracle Fusion Middleware Helidon version 3.2.19 must apply the latest security patches provided by Oracle immediately. It is critical to verify that all instances are updated to a patched release where the authorization checks in the Imperative Web Server have been hardened. In addition to patching, implementing strict network segmentation can limit exposure by restricting HTTP access to Helidon components only from trusted internal networks or through secure gateways with additional authentication layers. Deploying a Web Application Firewall (WAF) configured to detect and block anomalous request patterns associated with this flaw can provide an extra layer of defense. Furthermore, enforcing multi-factor authentication for any administrative interfaces and reviewing logging mechanisms to monitor for unauthorized data access attempts will help in early detection and response should the vulnerability be exploited before patches are fully deployed across all environments.