CVE-2026-39980

OpenCTI affected by RCE via notifier template

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

OpenCTI-Platform · opencti

CVSS v3.1 NVD

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

CVSS v3.1 GITHUB

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

EPSS

1.31% chance of exploitation in the next 30 days, 70th percentile

Published

2026-04-09

Metasploit modules (1)

• rapid7/metasploit-framework/blob/master/modules/exploits/linux/http/opencti_notifier_rce…

Security advisories

• OpenCTI-Platform/opencti/security/advisories/GHSA-jv9r-jw2f-rhrf
• OpenCTI-Platform/opencti/releases/tag/6.9.5

References

• CVE Record
• NVD entry