{"id":"CVE-2026-54301","sourceIdentifier":"security-advisories@github.com","published":"2026-06-23T17:17:06.053","lastModified":"2026-10-26T11:10:00.157","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"n8n is an open source workflow automation platform. Prior to 1.123.55, 2.25.7, and 2.26.2, an authenticated user with workflow edit access could configure a Respond to Webhook node to serve binary content with an attacker-controlled Content-Type. The binary response path bypassed the central Content-Security-Policy sandbox header, allowing a public webhook to execute JavaScript in the n8n origin when visited by an authenticated user, with access to that user's session. This vulnerability is fixed in 1.123.55, 2.25.7, and 2.26.2."},{"lang":"es","value":"n8n es una plataforma de automatización de flujos de trabajo de código abierto. Antes de 1.123.55, 2.25.7 y 2.26.2, un usuario autenticado con acceso de edición de flujos de trabajo podía configurar un nodo Respond to Webhook para servir contenido binario con un Content-Type controlado por el atacante. La ruta de respuesta binaria eludía el encabezado sandbox central de Content-Security-Policy, permitiendo que un webhook público ejecutara JavaScript en el origen de n8n cuando era visitado por un usuario autenticado, con acceso a la sesión de ese usuario. Esta vulnerabilidad está corregida en 1.123.55, 2.25.7 y 2.26.2."}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"n8n-io","product":"n8n","versions":[{"version":"< 1.123.55","status":"affected"},{"version":">= 2.0.0-rc.0, < 2.25.7","status":"affected"},{"version":">= 2.26.0, < 2.26.2","status":"affected"}]}]}],"metrics":{"cvssMetricV40":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:L/VA:N/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","baseScore":7.0,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"LOW","userInteraction":"PASSIVE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"LOW","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","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:L/UI:R/S:C/C:L/I:L/A:N","baseScore":5.4,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"REQUIRED","scope":"CHANGED","confidentialityImpact":"LOW","integrityImpact":"LOW","availabilityImpact":"NONE"},"exploitabilityScore":2.3,"impactScore":2.7}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-06-24T14:00:06.000876Z","id":"CVE-2026-54301","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-79"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:n8n:n8n:*:*:*:*:*:node.js:*:*","versionEndExcluding":"1.123.55","matchCriteriaId":"89E9BFA6-AA6E-4394-B819-7FFB7DFE203C"},{"vulnerable":true,"criteria":"cpe:2.3:a:n8n:n8n:*:*:*:*:*:node.js:*:*","versionStartIncluding":"2.0.0","versionEndExcluding":"2.25.7","matchCriteriaId":"0F398456-8B34-498A-B8A3-915C84C424F4"},{"vulnerable":true,"criteria":"cpe:2.3:a:n8n:n8n:*:*:*:*:*:node.js:*:*","versionStartIncluding":"2.26.0","versionEndExcluding":"2.26.2","matchCriteriaId":"970A6AA3-03FF-4B9D-85C1-462C5C7F7171"}]}]}],"references":[{"url":"https://github.com/n8n-io/n8n/security/advisories/GHSA-v733-mwr6-fgcm","source":"security-advisories@github.com","tags":["Mitigation","Vendor Advisory"]}]}