CVE-2026-1181
CRITICAL EPSS 22.4%
Published Jan 19, 20265mo ago · Modified Jun 17, 20262w ago
9.0 CVSS 3.1
Published Jan 19, 2026 5mo ago
Last Modified Jun 17, 2026 2w ago
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.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction Required
Scope Changed
Confidentiality High
Integrity High
Availability High
Threat Intelligence
EPSS Exploit Probability
22.4% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 2
CWE-284
CWE-942
References 1
- altium.com https://www.altium.com/platform/security-compliance/security-advisories
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.