CVE-2026-39980

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CVSS 3.1

7.2 high

EPSS

<1%p43

Published

Apr 9, 2026 (Apr 9, 2026)

Modified

Jun 17, 2026

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.

Vendors: citeum
Products: opencti
Weakness: CWE-1336
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

NVD CVE.org GitHub PoCs EPSS (0.5%)

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