CVE-2026-39980

Published: Apr 9, 2026Modified: Jun 17, 2026

7.2

Vector

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

Exploitability: 1.2 / Impact: 5.9

Source: NVD

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.

Affected (1)

Products: Citeum: Opencti

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Citeum Opencti	Before 6.9.5

Related CWEs

Improper Neutralization of Special Elements Used in a Template Engine

The product uses a template engine to insert or process externally-influenced input, but it does not neutralize or incorrectly neutralizes special elements or syntax that can be interpreted as template expressions or other code directives when processed by the engine.

References (2)

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

Source: security-advisories@github.com

ProductRelease Notes

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

Source: security-advisories@github.com

Vendor Advisory

Timeline

No history available yet.