CVE-2026-1181

Altium 365 workspace endpoints were configured with an overly permissive Cross-Origin Resource Sharing (CORS) policy that allowed credentialed cross-origin requests from other Altium-controlled subdomains, including forum.live.altium.com. As a result, JavaScript executing on those origins could access authenticated workspace APIs in the context of a logged-in user. When chained with vulnerabilities in those external applications, this misconfiguration enables unauthorized access to workspace data, administrative actions, and bypass of IP allowlisting controls, including in GovCloud environments.

The following products are affected by CVE-2026-1181 vulnerability.

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-1181.

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