CVE-2026-1181

Published: Jan 19, 2026Modified: Jun 17, 2026Deferred

9.0

Vector

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

Exploitability: 2.3 / Impact: 6.0

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

Description

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.

Related CWEs

CWE-284

Improper Access Control

The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.

CWE-942

Permissive Cross-domain Policy with Untrusted Domains

The product uses a cross-domain policy file that includes domains that should not be trusted.

References (1)

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

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

Timeline

No history available yet.