CVE-2026-72769

{"id": "CVE-2026-72769", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-72769", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-08-11T14:02:42.534015Z"}}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.1, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 5.2, "exploitabilityScore": 2.8}], "cvssMetricV40": [{"type": "Secondary", "source": "disclosure@vulncheck.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 6.1, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/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", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "LOW", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "disclosure@vulncheck.com", "affectedData": [{"vendor": "n8n-io", "product": "n8n", "versions": [{"status": "affected", "version": "0", "lessThan": "1.123.67", "versionType": "semver"}, {"status": "unaffected", "version": "1.123.67", "versionType": "semver"}], "packageURL": "pkg:npm/n8n", "defaultStatus": "unaffected"}, {"vendor": "n8n-io", "product": "n8n", "versions": [{"status": "affected", "version": "2.32.0", "lessThan": "2.32.1", "versionType": "semver"}, {"status": "unaffected", "version": "2.32.1", "versionType": "semver"}], "packageURL": "pkg:npm/n8n", "defaultStatus": "unaffected"}, {"vendor": "n8n-io", "product": "n8n", "versions": [{"status": "affected", "version": "2.0.0-rc.0", "lessThan": "2.31.5", "versionType": "semver"}, {"status": "unaffected", "version": "2.31.5", "versionType": "semver"}], "packageURL": "pkg:npm/n8n", "defaultStatus": "unaffected"}]}], "published": "2026-08-11T13:19:07.220", "references": [{"url": "https://github.com/n8n-io/n8n/security/advisories/GHSA-hx4h-vr3m-45vh", "tags": ["Mitigation", "Vendor Advisory"], "source": "disclosure@vulncheck.com"}, {"url": "https://www.vulncheck.com/advisories/n8n-before-prototype-pollution-via-vm-expression-engine", "tags": ["Third Party Advisory"], "source": "disclosure@vulncheck.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "disclosure@vulncheck.com", "description": [{"lang": "en", "value": "CWE-1321"}]}], "descriptions": [{"lang": "en", "value": "n8n before 1.123.67, 2.31.5, and 2.32.1 contains a prototype pollution vulnerability in the VM expression engine. An authenticated user able to create or edit a workflow expression can abuse the engine's array-element access to obtain a reference to a host built-in and pollute its prototype in the main n8n process (a sandbox escape), leading to a denial of service. Both self-hosted and cloud instances running the VM expression engine are affected."}, {"lang": "es", "value": "n8n antes de 1.123.67, 2.31.5 y 2.32.1 contiene una vulnerabilidad de contaminaci\u00f3n de prototipos en el motor de expresiones de la VM. Un usuario autenticado capaz de crear o editar una expresi\u00f3n de flujo de trabajo puede abusar del acceso a elementos de array del motor para obtener una referencia a una funci\u00f3n integrada del host y contaminar su prototipo en el proceso principal de n8n (un escape de sandbox), lo que lleva a una denegaci\u00f3n de servicio. Tanto las instancias autoalojadas como las de la nube que ejecutan el motor de expresiones de la VM se ven afectadas."}], "lastModified": "2026-10-29T20:17:34.837", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:n8n:n8n:*:*:*:*:*:node.js:*:*", "vulnerable": true, "matchCriteriaId": "4CBABC9C-8053-4556-99DF-B6A7BB96DFC0", "versionEndExcluding": "1.123.67"}, {"criteria": "cpe:2.3:a:n8n:n8n:*:*:*:*:*:node.js:*:*", "vulnerable": true, "matchCriteriaId": "81F5627C-88DD-42DB-877F-2376B96FF05F", "versionEndExcluding": "2.31.5", "versionStartIncluding": "2.0.0"}, {"criteria": "cpe:2.3:a:n8n:n8n:2.32.0:*:*:*:*:node.js:*:*", "vulnerable": true, "matchCriteriaId": "4AC4E002-974B-4748-A5CB-F8A40E4F3B24"}], "operator": "OR"}]}], "sourceIdentifier": "disclosure@vulncheck.com"}