CVE-2026-39980 | THREATINT

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.

PUBLISHED Reserved 2026-04-08 | Published 2026-04-09 | Updated 2026-04-09 | Assigner GitHub_M

CRITICAL: 9.1CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Problem types

CWE-1336: Improper Neutralization of Special Elements Used in a Template Engine

Product status

< 6.9.5

affected

References

github.com/...pencti/security/advisories/GHSA-jv9r-jw2f-rhrf

github.com/OpenCTI-Platform/opencti/releases/tag/6.9.5

cve.org (CVE-2026-39980)

nvd.nist.gov (CVE-2026-39980)

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