CVE-2026-1011

MEDIUM 6.1CVE-2026-1011 · Published 16/01/2026 · updated 17/06/2026

In short

CVE-2026-1011 is a MEDIUM (CVSS 6.1) vulnerability affecting altium live (altium).
Chance of exploitation in the next 30 days (EPSS): 0.29%, higher than 21.1% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
altium live altium	`≤ 1.1.1.39`	No fix yet

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.

References

altium.com/platform/security-compliance/security-advisories · Vendor Advisory

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