CVE-2026-1181 — Altium 365 Over-Permissive CORS Configuration Allows Credentialed Cross-Origin Workspace Access
Altium 365 workspace endpoints were configured with an overly permissive Cross-Origin Resource Sharing (CORS) policy that allowed credentialed cross-origin requests from other A…
Published: 2026-01-19 · CVSS: 9.0 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7