CVE-2026-1181

CRITICAL

9.0

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.

CVE Details

CVSS v3.1 Score9.0

SeverityCRITICAL

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

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredLOW

User InteractionREQUIRED

Published1/19/2026

Last Modified1/26/2026

Sourcenvd

Honeypot Sightings0

Weaknesses (CWE)

CWE-284CWE-942

References

https://www.altium.com/platform/security-compliance/security-advisories(4760f414-e1ae-4ff1-bdad-c7a9c3538b79)

IOC Correlations

No correlations recorded

This product uses data from the NVD API but is not endorsed or certified by the NVD.