CVE-2026-1010 is a stored cross-site scripting (XSS) vulnerability identified in the Altium Enterprise Server, specifically within the Altium Workflow Engine component. The root cause is the lack of server-side input sanitization in the workflow form submission APIs, which allows a regular authenticated user to inject arbitrary JavaScript code into the workflow data. This malicious payload is stored persistently and executes when an administrator views the compromised workflow, running in the administrator's browser context. This execution context grants the attacker the ability to escalate privileges by creating new administrator accounts, stealing session tokens, and performing unauthorized administrative actions. The vulnerability is classified under CWE-79 (Improper Neutralization of Input During Web Page Generation) and CWE-269 (Improper Privilege Management). The CVSS v3.1 base score is 8.0, indicating high severity, with attack vector network (remote), low attack complexity, requiring privileges (authenticated user), and user interaction (administrator viewing the payload). The scope remains unchanged, but the impact on confidentiality, integrity, and availability is high. No patches or known exploits are currently reported, but the vulnerability poses a significant risk due to the potential for privilege escalation and persistent compromise of administrative accounts.

For European organizations using Altium Enterprise Server, this vulnerability poses a critical risk to the security of their design and workflow management environments. Successful exploitation can lead to unauthorized administrative access, allowing attackers to manipulate workflows, steal sensitive session tokens, and potentially disrupt or sabotage engineering processes. This can result in intellectual property theft, operational downtime, and loss of trust in the integrity of engineering data. Given that Altium products are widely used in electronics design and manufacturing sectors, industries such as automotive, aerospace, telecommunications, and defense in Europe could be particularly impacted. The breach of administrative privileges could also facilitate lateral movement within corporate networks, increasing the overall attack surface. The requirement for an authenticated user to inject the payload limits exposure but does not eliminate risk, especially in environments with many users or weak internal controls.

European organizations should implement the following specific mitigations: 1) Immediately restrict workflow form submission permissions to trusted users only and review user roles to minimize unnecessary privileges. 2) Employ web application firewalls (WAFs) configured to detect and block suspicious JavaScript payloads in workflow submissions. 3) Enforce strict input validation and sanitization on all user inputs at the server side, even if patches are pending. 4) Monitor logs for unusual workflow submissions or administrative activity, focusing on new administrator account creations and session anomalies. 5) Educate administrators to be cautious when reviewing workflows and to report suspicious behavior promptly. 6) Coordinate with Altium for timely patch deployment once available and test updates in isolated environments before production rollout. 7) Consider implementing multi-factor authentication (MFA) for administrative accounts to reduce the impact of stolen session tokens. 8) Conduct regular security audits and penetration testing focused on internal user privileges and workflow management components.