CVE-2026-1011

Published: Jan 16, 2026Modified: Jan 23, 2026

6.1

Vector

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

Exploitability: 2.8 / Impact: 2.7

Source: 4760f414-e1ae-4ff1-bdad-c7a9c3538b79 (Secondary)

Description

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 (1)

Products: Altium: Altium Live

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Altium Altium Live	Up to 1.1.1.39

Related CWEs

Improper Encoding or Escaping of Output

The product prepares a structured message for communication with another component, but encoding or escaping of the data is either missing or done incorrectly. As a result, the intended structure of the message is not preserved.

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

References (1)

https://www.altium.com/platform/security-compliance/security-advisories

Source: 4760f414-e1ae-4ff1-bdad-c7a9c3538b79

Vendor Advisory

Timeline

No history available yet.