CVE-2026-35111 in AION
Summary
by MITRE • 11/06/2026
HCL AION is affected by a vulnerability where the Cross-Origin-Resource-Policy (CORP) header was missing or insecure, allowing application resources to be loaded by other origins. This may expose resources to cross-origin data leakage, potentially resulting in unintended behavior or security impact under certain conditions.
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Analysis
by VulDB Data Team • 11/06/2026
The identified vulnerability in HCL AION stems from a misconfiguration of the Cross-Origin-Resource-Policy header, which is critical for controlling how resources such as images, scripts, stylesheets, and iframes can be loaded by web pages originating from different domains. The absence or insecure implementation of this header means that the application fails to enforce strict boundaries on resource access based on origin. In modern web security architectures, browsers rely on these headers to prevent unauthorized cross-origin requests that could lead to data exfiltration or other malicious activities. Without a restrictive policy like same-origin or same-site, the browser permits any webpage from any domain to embed or fetch resources served by HCL AION, effectively bypassing standard Same-Origin Policy protections for those specific assets.
This lack of restriction creates a significant risk of cross-origin data leakage and unintended behavioral outcomes. Attackers could potentially craft malicious web pages that load sensitive internal resources from the vulnerable application context. While some resource types may not contain directly exploitable logic, others such as JavaScript files or configuration endpoints might expose internal architecture details, API structures, or user-specific data when accessed in a cross-origin context. Furthermore, if these resources are used in conjunction with other vulnerabilities like Cross-Site Scripting or CSRF, the impact can be escalated significantly. The vulnerability essentially weakens the defense-in-depth strategy by allowing external entities to interact with application assets that were intended for internal use only, thereby expanding the attack surface beyond what was originally designed and secured.
From a classification perspective, this issue aligns with CWE-1021 Improper Restriction of Rendered UI Layers or Frames, as it involves improper control over how resources are rendered across different origins. It also relates to CWE-942 Cross-Site Request Forgery Permissive Referer Check if the lack of CORP contributes to bypassing referer-based protections, although its primary classification is often associated with information disclosure and cross-origin resource sharing misconfigurations. In terms of MITRE ATT&CK techniques, this vulnerability facilitates reconnaissance and collection phases by allowing adversaries to gather intelligence about internal resources without triggering typical security alerts associated with direct unauthorized access attempts. It represents a foundational web application configuration error that undermines the isolation principles essential for secure multi-tenant or public-facing applications.
To mitigate this risk, it is imperative to configure the Cross-Origin-Resource-Policy header on all sensitive endpoints and static assets served by HCL AION. The recommended value depends on the specific use case but generally should be set to same-origin if resources are not intended for embedding in external pages, or same-site if cross-domain loading within trusted partner sites is required. Implementing this header ensures that browsers will block requests from unauthorized origins, thereby preventing potential data leakage and reducing the risk of exploitation through cross-origin vectors. Regular security audits and automated scanning should be employed to verify that CORP headers are consistently applied across all application components, ensuring compliance with industry best practices for web application security and maintaining strict isolation between internal resources and external entities.