CVE-2026-1011 MEDIUM

CVE-2026-1011: Stored Cross-Site Scripting in Altium Live Support Center Comment Endpoint

Vendor Altium
Product Altium Live
Weakness CWE-79 · XSS
Published January 15, 2026
Last update January 29, 2026
View on NVD All CVEs

CVSS base score

6.1/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Confidentiality Low
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

January 15, 2026 CVE published
January 29, 2026 Record updated