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CVE-2026-39980 (GCVE-0-2026-39980)
Vulnerability from cvelistv5 – Published: 2026-04-09 16:54 – Updated: 2026-04-09 18:44
VLAI
EPSS
VEX
Title
OpenCTI affected by RCE via notifier template
Summary
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.
Severity
9.1 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-09 18:43 UTC
CWE
- CWE-1336 - Improper Neutralization of Special Elements Used in a Template Engine
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/OpenCTI-Platform/opencti/secur… | x_refsource_CONFIRM |
| https://github.com/OpenCTI-Platform/opencti/relea… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| OpenCTI-Platform | opencti |
Affected:
< 6.9.5
|
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}
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"metrics": [
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"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 9.1,
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"confidentialityImpact": "HIGH",
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"privilegesRequired": "HIGH",
"scope": "CHANGED",
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"providerMetadata": {
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"discovery": "UNKNOWN"
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"title": "OpenCTI affected by RCE via notifier template"
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"dateReserved": "2026-04-08T00:01:47.628Z",
"dateUpdated": "2026-04-09T18:44:10.616Z",
"state": "PUBLISHED"
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PYSEC-2026-2265
Vulnerability from pysec - Published: 2026-04-09 18:17 - Updated: 2026-07-13 05:51
VLAI
Details
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.
Severity
7.2 (High)
Impacted products
| Name | purl | pycti | pkg:pypi/pycti |
|---|
Aliases
{
"affected": [
{
"ecosystem_specific": {},
"package": {
"ecosystem": "PyPI",
"name": "pycti",
"purl": "pkg:pypi/pycti"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "6.9.5"
}
],
"type": "ECOSYSTEM"
}
],
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"1.2.11",
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"1.2.13",
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]
}
],
"aliases": [
"CVE-2026-39980",
"GHSA-jv9r-jw2f-rhrf"
],
"details": "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.",
"id": "PYSEC-2026-2265",
"modified": "2026-07-13T05:51:02.394167Z",
"published": "2026-04-09T18:17:02.203Z",
"references": [
{
"type": "ADVISORY",
"url": "https://github.com/OpenCTI-Platform/opencti/releases/tag/6.9.5"
},
{
"type": "ADVISORY",
"url": "https://github.com/OpenCTI-Platform/opencti/security/advisories/GHSA-jv9r-jw2f-rhrf"
}
],
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}