CVE-2026-39980
CRITICAL
NVD
CVSS Score
9.1
Severity
CRITICAL
Published
Apr 09, 2026
Vendor
unknown
Description
OpenCTI is an open source platform for managing cyber threat intelligence knowledge and observables. Prior to 6.9.5, the safeEjs.ts file does not properly sanitize EJS templates. Users with the Manage customization capability can run arbitrary JavaScript in the context of the OpenCTI platform process during notifier template execution. This vulnerability is fixed in 6.9.5.