CVE-2026-39980

Name: CVE-2026-39980
Creator: NVD / NIST
Published: 2026-04-09T18:17:02.203+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.2/10EPSS 0.52%

Last modified Jun 17, 2026

CVE-2026-39980 is a high-severity vulnerability rated 7.2/10 on the CVSS scale. 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. EPSS estimates a 0.52% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.2/10

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

EPSS Probability

0.52%

40.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-1336

Affected Software

Vendor	Product	Versions
Citeum	Opencti	< 6.9.5

References

https://github.com/OpenCTI-Platform/opencti/releases/tag/6.9.5Product, Release Notes
https://github.com/OpenCTI-Platform/opencti/security/advisories/GHSA-jv9r-jw2f-rhrfVendor Advisory

Timeline

Published: Apr 9, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-39980?

How severe is CVE-2026-39980?

CVE-2026-39980 has a CVSS score of 7.2/10 (HIGH severity). The EPSS model estimates a 0.52% probability of exploitation in the next 30 days.

How do I fix CVE-2026-39980?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-39980?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST