CVE-2026-27578 (GCVE-0-2026-27578)

Vulnerability from cvelistv5 – Published: 2026-02-25 22:40 – Updated: 2026-02-26 20:16
VLAI?
Title
n8n Vulnerable to Stored XSS via Various Nodes
Summary
n8n is an open source workflow automation platform. Prior to versions 2.10.1, 2.9.3, and 1.123.22, an authenticated user with permission to create or modify workflows could inject arbitrary scripts into pages rendered by the n8n application using different techniques on various nodes (Form Trigger node, Chat Trigger node, Send & Wait node, Webhook Node, and Chat Node). Scripts injected by a malicious workflow execute in the browser of any user who visits the affected page, enabling session hijacking and account takeover. The issues have been fixed in n8n versions 2.10.1 and 1.123.21. Users should upgrade to one of these versions or later to remediate the vulnerability. If upgrading is not immediately possible, administrators should consider the following temporary mitigations. Limit workflow creation and editing permissions to fully trusted users only, and/or disable the Webhook node by adding `n8n-nodes-base.webhook` to the `NODES_EXCLUDE` environment variable. These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.
Severity ?
8.5 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:L/SI:L/SA:N
CWE
  • CWE-80 - Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
  • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
Impacted products
Vendor Product Version
n8n-io n8n Affected: < 1.123.22
Affected: >= 2.0.0, < 2.9.3
Affected: >= 2.10.0, < 2.10.1
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-27578",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-02-26T20:16:01.006614Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-02-26T20:16:20.758Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n8n",
          "vendor": "n8n-io",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.123.22"
            },
            {
              "status": "affected",
              "version": "\u003e= 2.0.0, \u003c 2.9.3"
            },
            {
              "status": "affected",
              "version": "\u003e= 2.10.0, \u003c 2.10.1"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "n8n is an open source workflow automation platform. Prior to versions 2.10.1, 2.9.3, and 1.123.22, an authenticated user with permission to create or modify workflows could inject arbitrary scripts into pages rendered by the n8n application using different techniques on various nodes (Form Trigger node, Chat Trigger node, Send \u0026 Wait node, Webhook Node, and Chat Node). Scripts injected by a malicious workflow execute in the browser of any user who visits the affected page, enabling session hijacking and account takeover. The issues have been fixed in n8n versions 2.10.1 and 1.123.21. Users should upgrade to one of these versions or later to remediate the vulnerability. If upgrading is not immediately possible, administrators should consider the following temporary mitigations. Limit workflow creation and editing permissions to fully trusted users only, and/or disable the Webhook node by adding `n8n-nodes-base.webhook` to the `NODES_EXCLUDE` environment variable. These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 8.5,
            "baseSeverity": "HIGH",
            "privilegesRequired": "LOW",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "LOW",
            "subIntegrityImpact": "LOW",
            "userInteraction": "PASSIVE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:L/SI:L/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-80",
              "description": "CWE-80: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-79",
              "description": "CWE-79: Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-02-25T22:40:38.606Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/n8n-io/n8n/security/advisories/GHSA-2p9h-rqjw-gm92",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/n8n-io/n8n/security/advisories/GHSA-2p9h-rqjw-gm92"
        },
        {
          "name": "https://github.com/n8n-io/n8n/commit/062644ef786b6af480afe4a0f12bc6d70040534a",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/n8n-io/n8n/commit/062644ef786b6af480afe4a0f12bc6d70040534a"
        },
        {
          "name": "https://github.com/n8n-io/n8n/commit/1479aab2d32fe0ee087f82b9038b1035c98be2f6",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/n8n-io/n8n/commit/1479aab2d32fe0ee087f82b9038b1035c98be2f6"
        },
        {
          "name": "https://github.com/n8n-io/n8n/commit/9e5212ecbc5d2d4e6f340b636a5e84be6369882e",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/n8n-io/n8n/commit/9e5212ecbc5d2d4e6f340b636a5e84be6369882e"
        }
      ],
      "source": {
        "advisory": "GHSA-2p9h-rqjw-gm92",
        "discovery": "UNKNOWN"
      },
      "title": "n8n Vulnerable to Stored XSS via Various Nodes"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-27578",
    "datePublished": "2026-02-25T22:40:38.606Z",
    "dateReserved": "2026-02-20T17:40:28.449Z",
    "dateUpdated": "2026-02-26T20:16:20.758Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-27578\",\"sourceIdentifier\":\"security-advisories@github.com\",\"published\":\"2026-02-25T23:16:21.560\",\"lastModified\":\"2026-02-27T14:06:59.787\",\"vulnStatus\":\"Undergoing Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"n8n is an open source workflow automation platform. Prior to versions 2.10.1, 2.9.3, and 1.123.22, an authenticated user with permission to create or modify workflows could inject arbitrary scripts into pages rendered by the n8n application using different techniques on various nodes (Form Trigger node, Chat Trigger node, Send \u0026 Wait node, Webhook Node, and Chat Node). Scripts injected by a malicious workflow execute in the browser of any user who visits the affected page, enabling session hijacking and account takeover. The issues have been fixed in n8n versions 2.10.1 and 1.123.21. Users should upgrade to one of these versions or later to remediate the vulnerability. If upgrading is not immediately possible, administrators should consider the following temporary mitigations. Limit workflow creation and editing permissions to fully trusted users only, and/or disable the Webhook node by adding `n8n-nodes-base.webhook` to the `NODES_EXCLUDE` environment variable. These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.\"},{\"lang\":\"es\",\"value\":\"n8n es una plataforma de automatizaci\u00f3n de flujos de trabajo de c\u00f3digo abierto. Antes de las versiones 2.10.1, 2.9.3 y 1.123.22, un usuario autenticado con permiso para crear o modificar flujos de trabajo pod\u00eda inyectar scripts arbitrarios en p\u00e1ginas renderizadas por la aplicaci\u00f3n n8n utilizando diferentes t\u00e9cnicas en varios nodos (nodo Form Trigger, nodo Chat Trigger, nodo Send \u0026amp; Wait, nodo Webhook y nodo Chat). Los scripts inyectados por un flujo de trabajo malicioso se ejecutan en el navegador de cualquier usuario que visite la p\u00e1gina afectada, lo que permite el secuestro de sesi\u00f3n y la toma de control de cuentas. Los problemas se han solucionado en las versiones de n8n 2.10.1 y 1.123.21. Los usuarios deben actualizar a una de estas versiones o posteriores para remediar la vulnerabilidad. Si la actualizaci\u00f3n no es posible de inmediato, los administradores deben considerar las siguientes mitigaciones temporales. Limite los permisos de creaci\u00f3n y edici\u00f3n de flujos de trabajo solo a usuarios de plena confianza, y/o deshabilite el nodo Webhook a\u00f1adiendo \u0027n8n-nodes-base.webhook\u0027 a la variable de entorno \u0027NODES_EXCLUDE\u0027. Estas soluciones provisionales no remedian completamente el riesgo y solo deben utilizarse como medidas de mitigaci\u00f3n a corto plazo.\"}],\"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:H/VA:N/SC:L/SI:L/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\":8.5,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"attackRequirements\":\"NONE\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"PASSIVE\",\"vulnConfidentialityImpact\":\"HIGH\",\"vulnIntegrityImpact\":\"HIGH\",\"vulnAvailabilityImpact\":\"NONE\",\"subConfidentialityImpact\":\"LOW\",\"subIntegrityImpact\":\"LOW\",\"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\"}}]},\"weaknesses\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-79\"},{\"lang\":\"en\",\"value\":\"CWE-80\"}]}],\"references\":[{\"url\":\"https://github.com/n8n-io/n8n/commit/062644ef786b6af480afe4a0f12bc6d70040534a\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/n8n-io/n8n/commit/1479aab2d32fe0ee087f82b9038b1035c98be2f6\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/n8n-io/n8n/commit/9e5212ecbc5d2d4e6f340b636a5e84be6369882e\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/n8n-io/n8n/security/advisories/GHSA-2p9h-rqjw-gm92\",\"source\":\"security-advisories@github.com\"}]}}"
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.