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CVE-2026-1181

🚨 CRITICAL

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 subdom...

Published
Jan 19, 2026
Last Modified
Jan 26, 2026
Views
12
Bookmarks
0

Description

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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 Scores

CVSS 3.1 9.0
9.0
CRITICAL
CVSS 2.0 9.0

References

www.altium.com

Additional Information

Source
4760f414-e1ae-4ff1-bdad-c7a9c3538b79
State
Awaiting analysis

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