What is CVE-2026-1011?

CVE-2026-1011 is a medium-severity vulnerability in Altium Live, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-01-16.

How severe is CVE-2026-1011?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Altium Live

CVE-2026-1011

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 ar…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.003 (16.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Altium Live — versions 0
Altium Altium_live

Weakness classification (CWE)

CWE-79 — Cross-site Scripting
CWE-116 — Improper Encoding or Escaping of Output

References

4760f414-e1ae-4ff1-bdad-c7a9c3538b79 (Vendor Advisory)

Frequently asked questions

What is CVE-2026-1011?: CVE-2026-1011 is a medium-severity vulnerability in Altium Live, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-01-16.
How severe is CVE-2026-1011?: Medium severity. CVSS v3 base score is 6.1 out of 10.