Critical
OpenCTI affected by RCE via notifier template
Type: advisorySources: OSV
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.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-39980
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 4 Nov 2026, 17:17 UTC · Revision 1
Source evidence
OpenCTI affected by RCE via notifier template
core-osv · Original sourcePublished 9 Apr 2026, 16:54 UTC
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.
osv:CVE-2026-39980
Complete source record
{
"id": "c571d1035d28c9629156a9cb907034873c002d4716134bfbef19460c216b8673",
"url": "https://osv.dev/vulnerability/CVE-2026-39980",
"method": "structured",
"payload": {
"kind": "advisory",
"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.",
"evidence": "osv:CVE-2026-39980",
"products": [],
"severity": "critical",
"structured": {
"id": "CVE-2026-39980",
"aliases": [
"CVE-2026-39980",
"GHSA-jv9r-jw2f-rhrf",
"PYSEC-2026-2265"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/opencti-platform/opencti",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "be4ab13c30d154adc3cfc49ba128b2039b93e348"
}
],
"database_specific": {
"extracted_events": [
{
"range": [
{
"introduced": "0"
},
{
"fixed": "6.9.5"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"range": [
{
"fixed": "be4ab13c30d154adc3cfc49ba128b2039b93e348"
}
],
"source": "REFERENCES_TAG",
"original_tag": "6.9.5"
},
{
"cpe": "cpe:2.3:a:citeum:opencti:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "6.9.5"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
"6.9.4",
"6.9.3",
"6.9.2",
"6.9.1",
"6.9.0",
"6.8.17",
"6.8.16",
"6.8.15",
"6.8.14",
"6.8.13",
"6.8.12",
"6.8.11",
"6.8.10",
"6.8.9",
"6.8.8",
"6.8.7",
"6.8.6",
"6.8.5",
"6.8.4",
"6.8.3",
"6.8.2",
"6.8.1",
"6.8.0",
"6.7.20",
"6.7.19",
"6.7.18",
"6.7.17",
"6.7.16",
"6.7.15",
"6.7.14",
"6.7.13",
"6.7.12",
"6.7.11",
"6.7.10",
"6.7.9",
"6.7.8",
"6.7.7",
"6.7.6",
"6.7.5",
"6.7.4",
"6.7.3",
"6.7.2",
"6.7.1",
"6.7.0",
"6.6.1",
"6.6.0",
"6.5.11",
"6.5.10",
"6.5.9",
"6.5.8",
"6.5.7",
"6.5.6",
"6.5.5",
"6.5.4",
"6.5.3",
"6.5.2",
"6.5.1",
"6.4.11",
"6.4.10",
"6.4.9",
"6.4.8",
"6.2.7",
"6.4.7",
"6.4.6",
"6.4.5",
"6.4.4",
"6.4.3",
"6.4.2",
"6.4.1",
"6.4.0",
"6.3.6",
"6.3.5",
"6.3.4",
"6.3.3",
"6.3.1",
"6.3.0",
"6.2.14",
"6.2.13",
"6.2.12",
"6.2.11",
"6.2.10",
"6.2.9",
"6.2.8",
"6.2.6",
"6.2.5",
"6.2.4",
"6.2.3",
"6.2.2",
"6.2.1",
"6.2.0",
"6.1.12",
"6.1.10",
"6.1.9",
"6.1.8",
"6.1.7",
"6.1.6",
"6.1.5",
"6.1.4",
"6.1.3",
"6.1.2",
"6.1.1",
"6.1.0",
"6.0.10",
"6.0.9",
"6.0.8",
"6.0.7",
"6.0.6",
"6.0.5",
"6.0.4",
"6.0.3",
"6.0.2",
"6.0.0",
"5.12.27",
"5.12.26",
"5.12.25",
"5.12.24",
"5.12.23",
"5.12.22",
"5.12.21",
"5.12.20",
"5.12.19",
"5.12.18",
"5.12.17",
"5.12.16",
"5.12.15",
"5.12.14",
"5.12.13",
"5.12.12",
"5.12.11",
"5.12.10",
"5.12.9",
"5.12.8",
"5.12.7",
"5.12.6",
"5.12.5",
"5.12.4",
"5.12.3",
"5.12.2",
"5.12.1",
"5.12.0",
"5.11.13",
"5.11.12",
"5.11.11",
"5.11.10",
"5.11.9",
"5.11.8",
"5.11.7",
"5.11.6",
"5.11.5",
"5.11.4",
"5.11.3",
"5.11.2",
"5.11.1",
"5.11.0",
"5.10.3",
"5.10.2",
"5.10.1",
"5.10.0",
"5.9.6",
"5.9.5",
"5.9.4",
"5.9.3",
"5.9.2",
"5.9.1",
"5.9.0",
"5.8.7",
"5.8.6",
"5.8.5",
"5.8.4",
"5.8.3",
"5.8.2",
"5.8.1",
"5.8.0",
"5.7.6",
"5.7.5",
"5.7.4",
"5.7.3",
"5.7.2",
"5.7.1",
"5.7.0",
"5.6.2",
"5.6.1",
"5.6.0",
"5.5.4",
"5.5.3",
"5.5.2",
"5.5.1",
"5.5.0",
"5.4.1",
"5.4.0",
"5.3.17",
"5.3.16",
"5.3.15",
"5.3.14",
"5.3.13",
"5.3.12",
"5.3.11",
"5.3.10",
"5.3.9",
"5.3.8",
"5.3.7",
"5.3.6",
"5.3.5",
"5.3.4",
"5.3.3",
"5.3.2",
"5.3.1",
"5.3.0",
"5.2.4",
"5.2.3",
"5.2.2",
"5.2.1",
"5.2.0",
"5.1.4",
"5.1.3",
"5.1.2",
"5.1.1",
"5.1.0",
"5.0.3",
"5.0.2",
"5.0.1",
"5.0.0",
"4.5.5",
"4.5.4",
"4.5.3",
"4.5.2",
"4.5.1",
"4.5.0",
"4.4.1",
"4.4.0",
"4.3.5",
"4.3.4",
"4.3.3",
"4.3.2",
"4.3.1",
"4.3.0",
"4.2.4",
"4.2.3",
"4.2.2",
"4.2.1",
"4.2.0",
"4.1.2",
"4.1.1",
"4.1.0",
"4.0.7",
"4.0.6",
"4.0.5",
"4.0.4",
"4.0.3",
"4.0.2",
"4.0.1",
"4.0.0",
"3.3.2",
"3.3.1",
"3.3.0",
"3.2.2",
"3.2.0",
"3.0.3",
"3.0.2",
"3.0.1",
"3.0.0",
"2.1.4",
"2.1.3",
"2.1.2",
"2.1.1",
"2.1.0",
"2.0.2",
"2.0.1",
"1.1.2",
"1.1.0",
"1.0.2",
"1.0.1",
"1.0.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-39980.json"
}
}
],
"modified": "2026-10-28T02:30:37.809343918Z",
"provider": "osv",
"references": [
"https://github.com/OpenCTI-Platform/opencti/releases/tag/6.9.5",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/39xxx/CVE-2026-39980.json",
"https://github.com/OpenCTI-Platform/opencti/security/advisories/GHSA-jv9r-jw2f-rhrf",
"https://nvd.nist.gov/vuln/detail/CVE-2026-39980"
],
"provider_metadata": {
"cwe_ids": [
"CWE-1336"
],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/39xxx/CVE-2026-39980.json"
}
},
"related_cves": [
{
"value": "CVE-2026-39980",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 505237,
"published_at": "2026-04-09T16:54:31.566+00:00"
}