CVE-2026-101322 in BaSyx AAS Web UI
Summary
by MITRE • 10/01/2026
In Eclipse BaSyx AAS Web UI versions v2-241220 through releases before v2-260924, the shared request handler attached the selected infrastructure's `Authorization` header to outgoing requests without checking the destination origin. In deployments using authentication, an attacker could induce a user to open a crafted Web UI link whose `aas` or `path` query parameter points to an attacker-controlled endpoint. The user's browser would then send the configured Basic Authentication credentials, Bearer token, or an available OAuth2 access token to that endpoint. The attacker could reuse the disclosed credential to access protected AAS services with the victim's privileges. The issue is fixed in v2-260924.
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Analysis
by VulDB Data Team • 10/01/2026
The vulnerability identified in Eclipse BaSyx Asset Administration Shell (AAS) Web UI versions ranging from v2-241220 to releases prior to v2-260924 represents a critical flaw in the handling of cross-origin requests and authentication credentials. This issue stems from an insecure implementation within the shared request handler, which is responsible for managing outgoing HTTP requests initiated by the user interface. Specifically, the application fails to validate the origin or destination domain before attaching sensitive authorization headers, such as Basic Authentication credentials, Bearer tokens, or OAuth2 access tokens, to these requests. This oversight creates a significant security gap where the integrity of authentication data cannot be guaranteed when interacting with external resources.
From an operational perspective, this flaw allows for a sophisticated cross-site request forgery scenario that results in credential leakage rather than just unauthorized actions on behalf of the user. An attacker can craft a malicious Web UI link containing specific query parameters, namely `aas` or `path`, which direct the application to communicate with a server under the attacker's control. When an authenticated victim opens this crafted link within their browser session, the vulnerable request handler automatically attaches the active authentication headers from the current context to the outgoing request destined for the malicious endpoint. Consequently, the user's sensitive credentials are transmitted directly to the attacker without any warning or consent mechanism that would typically trigger in standard cross-origin scenarios due to same-origin policy restrictions on reading responses.
The impact of this vulnerability is severe, as it effectively bypasses the intended isolation boundaries between different origins. By capturing these disclosed credentials, an attacker gains the ability to impersonate the victim and access protected Asset Administration Shell services with full privileges associated with that user account. This compromises not only the confidentiality of the authentication tokens but also the integrity and availability of the industrial IoT data managed by the AAS environment. The attack vector aligns closely with CWE-200, which covers exposure of sensitive information to an unauthorized actor, and can be mapped to MITRE ATT&CK techniques involving credential access through browser-based exploitation methods similar to T1539 or general web application attacks like T1187 if combined with other vectors.
To mitigate this risk, organizations must immediately upgrade the Eclipse BaSyx AAS Web UI to version v2-260924 or later, where the shared request handler has been patched to enforce strict origin validation before attaching authorization headers. In environments where upgrading is not immediately feasible, temporary mitigations should include implementing a Content Security Policy that restricts outgoing connections to only trusted domains and disabling any features that allow arbitrary path manipulation via query parameters until the patch can be applied. Additionally, deploying Web Application Firewalls with rules designed to detect anomalous cross-origin requests carrying authentication headers can provide an additional layer of defense against exploitation attempts targeting this specific flaw.