CVE-2026-39980

CRITICAL SEVERITY

CVSS Score & Metrics

Base Score

9.1 / 10

Vector String

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

Vulnerability 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.

Vulnerability Details

Published Date

April 09, 2026

Last Modified

April 13, 2026

CWE ID

CWE-1336

Source

NVD

Vendor

OpenCTI-Platform

Product

opencti

External References

https://github.com/OpenCTI-Platform/opencti/releases/tag/6.9.5
https://github.com/OpenCTI-Platform/opencti/security/advisories/GHSA-jv9r-jw2f-rhrf

CVE-2026-39980

CVSS Score & Metrics

Vulnerability Description

Vulnerability Details

External References

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