CVE-2026-65591
Full vulnerability record from the local CVENow database.
Description
n8n contains a sanitizer bypass vulnerability in the legacy expression evaluator's computed-member handler. An authenticated user with workflow create or modify permissions can craft a malicious expression to bypass the sanitizer and achieve host-level code execution as the n8n process. The legacy expression engine is the default in affected versions. Fixed in n8n 1.123.64, 2.29.8, and 2.30.1.
Severity
HIGH
CVSS score
8.9
(v4.0)
Vulnerability status
Analyzed
Source identifier
Published
2026-07-22 12:18:19.117000
Last modified
2026-10-29 19:17:26.320000
View original CVE JSON
{
"id": "CVE-2026-65591",
"sourceIdentifier": "[email protected]",
"published": "2026-07-22T12:18:19.117",
"lastModified": "2026-10-29T19:17:26.320",
"vulnStatus": "Analyzed",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "n8n contains a sanitizer bypass vulnerability in the legacy expression evaluator's computed-member handler. An authenticated user with workflow create or modify permissions can craft a malicious expression to bypass the sanitizer and achieve host-level code execution as the n8n process. The legacy expression engine is the default in affected versions. Fixed in n8n 1.123.64, 2.29.8, and 2.30.1."
},
{
"lang": "es",
"value": "n8n contiene una vulnerabilidad de omisión de saneador en el gestor de miembros computados del evaluador de expresiones heredado. Un usuario autenticado con permisos para crear o modificar flujos de trabajo puede crear una expresión maliciosa para omitir el saneador y lograr la ejecución de código a nivel de host como el proceso de n8n. El motor de expresiones heredado es el predeterminado en las versiones afectadas. Corregido en n8n 1.123.64, 2.29.8 y 2.30.1."
}
],
"affected": [
{
"source": "[email protected]",
"affectedData": [
{
"vendor": "n8n-io",
"product": "n8n",
"defaultStatus": "unaffected",
"packageURL": "pkg:npm/n8n",
"versions": [
{
"version": "0",
"lessThan": "1.123.64",
"versionType": "semver",
"status": "affected"
},
{
"version": "1.123.64",
"versionType": "semver",
"status": "unaffected"
}
]
},
{
"vendor": "n8n-io",
"product": "n8n",
"defaultStatus": "unaffected",
"packageURL": "pkg:npm/n8n",
"versions": [
{
"version": "2.30.0",
"lessThan": "2.30.1",
"versionType": "semver",
"status": "affected"
},
{
"version": "2.30.1",
"versionType": "semver",
"status": "unaffected"
}
]
},
{
"vendor": "n8n-io",
"product": "n8n",
"defaultStatus": "unaffected",
"packageURL": "pkg:npm/n8n",
"versions": [
{
"version": "2.0.0-rc.0",
"lessThan": "2.29.8",
"versionType": "semver",
"status": "affected"
},
{
"version": "2.29.8",
"versionType": "semver",
"status": "unaffected"
}
]
}
]
}
],
"metrics": {
"cvssMetricV40": [
{
"source": "[email protected]",
"type": "Secondary",
"cvssData": {
"version": "4.0",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"baseScore": 8.9,
"baseSeverity": "HIGH",
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"attackRequirements": "PRESENT",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"vulnConfidentialityImpact": "HIGH",
"vulnIntegrityImpact": "HIGH",
"vulnAvailabilityImpact": "HIGH",
"subConfidentialityImpact": "HIGH",
"subIntegrityImpact": "HIGH",
"subAvailabilityImpact": "LOW",
"exploitMaturity": "NOT_DEFINED",
"confidentialityRequirement": "NOT_DEFINED",
"integrityRequirement": "NOT_DEFINED",
"availabilityRequirement": "NOT_DEFINED",
"modifiedAttackVector": "NOT_DEFINED",
"modifiedAttackComplexity": "NOT_DEFINED",
"modifiedAttackRequirements": "NOT_DEFINED",
"modifiedPrivilegesRequired": "NOT_DEFINED",
"modifiedUserInteraction": "NOT_DEFINED",
"modifiedVulnConfidentialityImpact": "NOT_DEFINED",
"modifiedVulnIntegrityImpact": "NOT_DEFINED",
"modifiedVulnAvailabilityImpact": "NOT_DEFINED",
"modifiedSubConfidentialityImpact": "NOT_DEFINED",
"modifiedSubIntegrityImpact": "NOT_DEFINED",
"modifiedSubAvailabilityImpact": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"valueDensity": "NOT_DEFINED",
"vulnerabilityResponseEffort": "NOT_DEFINED",
"providerUrgency": "NOT_DEFINED"
}
}
],
"cvssMetricV31": [
{
"source": "[email protected]",
"type": "Primary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"baseScore": 8.8,
"baseSeverity": "HIGH",
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"availabilityImpact": "HIGH"
},
"exploitabilityScore": 2.8,
"impactScore": 5.9
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2026-07-22T15:49:18.716129Z",
"id": "CVE-2026-65591",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "total"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
]
},
"weaknesses": [
{
"source": "[email protected]",
"type": "Secondary",
"description": [
{
"lang": "en",
"value": "CWE-917"
}
]
}
],
"configurations": [
{
"nodes": [
{
"operator": "OR",
"negate": false,
"cpeMatch": [
{
"vulnerable": true,
"criteria": "cpe:2.3:a:n8n:n8n:*:*:*:*:community:node.js:*:*",
"versionEndExcluding": "1.123.64",
"matchCriteriaId": "843094AD-81C8-4961-A8A1-037468DEACA7"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:a:n8n:n8n:*:*:*:*:enterprise:node.js:*:*",
"versionEndExcluding": "1.123.64",
"matchCriteriaId": "E1626500-EC42-4BF5-8ECE-6E5E249D37F6"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:a:n8n:n8n:*:*:*:*:community:node.js:*:*",
"versionStartIncluding": "2.0.0",
"versionEndExcluding": "2.29.8",
"matchCriteriaId": "3281592C-CB07-412C-9770-3521447ADEC1"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:a:n8n:n8n:*:*:*:*:enterprise:node.js:*:*",
"versionStartIncluding": "2.0.0",
"versionEndExcluding": "2.29.8",
"matchCriteriaId": "E4A0C557-F57B-4931-A857-ACC4639C030D"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:a:n8n:n8n:2.30.0:*:*:*:community:node.js:*:*",
"matchCriteriaId": "E125F7EF-F72F-427F-82DE-D6A505B1DF8F"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:a:n8n:n8n:2.30.0:*:*:*:enterprise:node.js:*:*",
"matchCriteriaId": "3C2780A0-55EC-488D-9149-EE83BA246A38"
}
]
}
]
}
],
"references": [
{
"url": "https://github.com/n8n-io/n8n/security/advisories/GHSA-pm35-fqvh-cq5g",
"source": "[email protected]",
"tags": [
"Mitigation",
"Vendor Advisory"
]
},
{
"url": "https://www.vulncheck.com/advisories/n8n-before-sanitizer-bypass-remote-code-execution",
"source": "[email protected]",
"tags": [
"Third Party Advisory"
]
}
]
}