CVE-2026-1181

critical · 9

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.

CVSS

0.4%

EPSS (exploit prob.)

29th

EPSS percentile

2026-01-19

Published

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

Weaknesses

CWE-284CWE-942

References

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

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-1181