CVE-2026-1011: Stored Cross-Site Scripting in Altium Live Support Center Comment Endpoint
A stored cross-site scripting (XSS) vulnerability exists in the Altium Support Center AddComment endpoint due to missing server-side input sanitization. Although the client interface applies HTML escaping, the backend accepts and stores arbitrary HTML and JavaScript supplied via modified POST requests.
The injected content is rendered verbatim when support cases are viewed by other users, including support staff with elevated privileges, allowing execution of arbitrary JavaScript in the victim’s browser context.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-1011?
CVE-2026-1011 is classified as a high-severity vulnerability due to its potential impact on user data and application integrity.
How do I fix CVE-2026-1011?
To fix CVE-2026-1011, ensure proper server-side input sanitization is implemented in the AddComment endpoint.
What systems are affected by CVE-2026-1011?
CVE-2026-1011 affects the Altium Support Center software, specifically its comment submission feature.
What type of vulnerability is CVE-2026-1011?
CVE-2026-1011 is a stored cross-site scripting (XSS) vulnerability.
Can CVE-2026-1011 lead to data breaches?
Yes, CVE-2026-1011 can potentially lead to data breaches by allowing attackers to execute malicious scripts in user browsers.