{"id":"CVE-2026-72766","sourceIdentifier":"disclosure@vulncheck.com","published":"2026-08-11T13:19:06.807","lastModified":"2026-10-24T15:10:00.190","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"n8n before 1.123.67, 2.x before 2.31.5, and 2.32.x before 2.32.1 contain a type confusion vulnerability in the Send Email node, which does not enforce that its message fields are strings. A crafted non-string value supplied from a workflow expression into the text or HTML body field can be interpreted by the underlying mail library (Nodemailer) as a file path or URL, allowing arbitrary local file disclosure and server-side request forgery (SSRF). Exploitation requires a pre-existing active workflow with an unauthenticated webhook, valid SMTP credentials configured on the node, and untrusted input mapped directly into the body field; this is not a default configuration."},{"lang":"es","value":"n8n anterior a 1.123.67, 2.x anterior a 2.31.5, y 2.32.x anterior a 2.32.1 contienen una vulnerabilidad de confusión de tipos en el nodo ’Send Email’, que no asegura que sus campos de mensaje sean cadenas de texto. Un valor no-cadena de texto manipulado, proporcionado desde una expresión de flujo de trabajo en el campo de cuerpo de texto o HTML, puede ser interpretado por la biblioteca de correo subyacente (Nodemailer) como una ruta de archivo o URL, permitiendo la divulgación arbitraria de archivos locales y falsificación de petición del lado del servidor (SSRF). La explotación requiere un flujo de trabajo activo preexistente con un webhook no autenticado, credenciales SMTP válidas configuradas en el nodo, y entrada no confiable mapeada directamente en el campo del cuerpo; esta no es una configuración predeterminada."}],"affected":[{"source":"disclosure@vulncheck.com","affectedData":[{"vendor":"n8n-io","product":"n8n","defaultStatus":"unaffected","packageURL":"pkg:npm/n8n","versions":[{"version":"0","lessThan":"1.123.67","versionType":"semver","status":"affected"},{"version":"1.123.67","versionType":"semver","status":"unaffected"}]},{"vendor":"n8n-io","product":"n8n","defaultStatus":"unaffected","packageURL":"pkg:npm/n8n","versions":[{"version":"0","lessThan":"2.32.1","versionType":"semver","status":"affected"},{"version":"2.32.1","versionType":"semver","status":"unaffected"}]},{"vendor":"n8n-io","product":"n8n","defaultStatus":"unaffected","packageURL":"pkg:npm/n8n","versions":[{"version":"0","lessThan":"2.31.5","versionType":"semver","status":"affected"},{"version":"2.31.5","versionType":"semver","status":"unaffected"}]}]}],"metrics":{"cvssMetricV40":[{"source":"disclosure@vulncheck.com","type":"Secondary","cvssData":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:L/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","baseScore":8.2,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"LOW","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","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":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"NONE"},"exploitabilityScore":3.9,"impactScore":3.6}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-08-14T19:50:38.898583Z","id":"CVE-2026-72766","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"disclosure@vulncheck.com","type":"Secondary","description":[{"lang":"en","value":"CWE-843"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:n8n:n8n:*:*:*:*:community:node.js:*:*","versionEndExcluding":"1.123.67","matchCriteriaId":"D963758D-5493-4A20-881B-DE05BAFAD896"},{"vulnerable":true,"criteria":"cpe:2.3:a:n8n:n8n:*:*:*:*:enterprise:node.js:*:*","versionEndExcluding":"1.123.67","matchCriteriaId":"32A28E0A-5FBC-4C97-B443-540E01F80C8A"},{"vulnerable":true,"criteria":"cpe:2.3:a:n8n:n8n:*:*:*:*:community:node.js:*:*","versionStartIncluding":"2.0.0","versionEndExcluding":"2.31.5","matchCriteriaId":"AD768539-E781-401F-BE44-02E438BA9F6A"},{"vulnerable":true,"criteria":"cpe:2.3:a:n8n:n8n:*:*:*:*:enterprise:node.js:*:*","versionStartIncluding":"2.0.0","versionEndExcluding":"2.31.5","matchCriteriaId":"969CE8A9-6759-4E7C-AC79-81FF38772F70"},{"vulnerable":true,"criteria":"cpe:2.3:a:n8n:n8n:2.32.0:*:*:*:community:node.js:*:*","matchCriteriaId":"A6AC605A-BDCF-4BFC-8B13-760CA2BD4C6C"},{"vulnerable":true,"criteria":"cpe:2.3:a:n8n:n8n:2.32.0:*:*:*:enterprise:node.js:*:*","matchCriteriaId":"20BD46BF-7D8F-4035-A8B9-E8338BF96909"}]}]}],"references":[{"url":"https://github.com/n8n-io/n8n/security/advisories/GHSA-2x35-3fw4-9jr4","source":"disclosure@vulncheck.com","tags":["Vendor Advisory","Mitigation"]},{"url":"https://www.vulncheck.com/advisories/n8n-before-arbitrary-file-read-via-send-email-node","source":"disclosure@vulncheck.com","tags":["Third Party Advisory"]}]}