CVE-2026-1010 in 365
Summary
by MITRE • 01/16/2026
A stored cross-site scripting (XSS) vulnerability exists in the Altium Workflow Engine due to missing server-side input sanitization in workflow form submission APIs. A regular authenticated user can inject arbitrary JavaScript into workflow data.
When an administrator views the affected workflow, the injected payload executes in the administrator’s browser context, allowing privilege escalation, including creation of new administrator accounts, session token theft, and execution of administrative actions.
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Analysis
by VulDB Data Team • 02/05/2026
The vulnerability identified as CVE-2026-1010 represents a critical stored cross-site scripting flaw within the Altium Workflow Engine system. This security weakness stems from inadequate server-side validation mechanisms that fail to properly sanitize user input submitted through workflow form APIs. The vulnerability specifically affects the processing of workflow data where user-provided content is stored without proper sanitization measures, creating a persistent XSS attack vector that can be exploited by authenticated users with regular privileges.
The technical implementation of this vulnerability occurs at the application layer where workflow form submissions are processed and stored in the system's database without adequate input validation or sanitization. When an authenticated user submits malicious JavaScript code through a workflow form, this content is stored verbatim and later retrieved when administrators view the workflow data. The absence of server-side sanitization creates a condition where user input containing malicious scripts can persist and execute in the context of other users' browsers, particularly administrators who have elevated privileges within the system.
The operational impact of this vulnerability extends far beyond simple script execution, as it enables significant privilege escalation capabilities for attackers. When administrators view affected workflow data containing the malicious payload, the injected JavaScript executes within their browser context, potentially allowing attackers to create new administrator accounts, steal session tokens, and perform administrative actions that would normally be restricted to privileged users. This creates a severe risk of complete system compromise, as the vulnerability essentially provides a backdoor mechanism for attackers to gain elevated access and maintain persistence within the Altium Workflow Engine environment.
Security practitioners should recognize this vulnerability as a classic example of CWE-79 - Improper Neutralization of Input During Web Page Generation, which directly maps to the stored XSS pattern where malicious input is stored and later executed. The ATT&CK framework categorizes this vulnerability under T1059.007 - Command and Scripting Interpreter: JavaScript, as the malicious code executes in the browser context of targeted administrators. Additionally, the vulnerability demonstrates characteristics of T1548.001 - Abuse of Functionality: Valid Accounts, since it leverages legitimate authenticated user accounts to execute malicious code against other privileged users within the same system.
Mitigation strategies should focus on implementing robust server-side input sanitization and validation mechanisms that filter and escape all user-provided content before storage. Organizations should deploy comprehensive content security policies and implement proper output encoding to prevent script execution in browser contexts. Regular security testing including automated scanning and manual penetration testing should be conducted to identify similar vulnerabilities in other workflow components. Additionally, privilege separation mechanisms should be implemented to reduce the impact of potential XSS exploitation, ensuring that even if such vulnerabilities exist, administrative privileges cannot be easily compromised through simple user-to-administrator privilege escalation attacks.