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    "cveMetadata": {
        "cveId": "CVE-2026-110842",
        "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "state": "PUBLISHED",
        "assignerShortName": "VulnCheck",
        "dateReserved": "2026-10-14T22:12:22.055Z",
        "datePublished": "2026-10-14T22:52:17.341Z",
        "dateUpdated": "2026-10-15T13:44:50.036Z"
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            "datePublic": "2026-09-30T00:00:00.000Z",
            "title": "n8n before 2.41.4 and 2.42.1 Prototype Pollution via MCP Workflow-Validation Interpreter",
            "descriptions": [
                {
                    "lang": "en",
                    "value": "n8n before 2.41.4 and 2.42.x before 2.42.1 contains a prototype pollution vulnerability in the MCP workflow-validation tool, whose interpreter evaluates caller-supplied code in the main process, reads inherited properties, and permits assignment onto shared prototypes. An authenticated member holding only a workflow:read grant can replace a built-in method with one returning a truthy value so server-side permission checks accept unheld scopes, enabling takeover of owner accounts not protected by MFA."
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                    "descriptions": [
                        {
                            "lang": "en",
                            "description": "Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')",
                            "cweId": "CWE-1321",
                            "type": "CWE"
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            "affected": [
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                    "vendor": "n8n-io",
                    "product": "n8n",
                    "defaultStatus": "unaffected",
                    "packageURL": "pkg:npm/n8n",
                    "versions": [
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                            "version": "0",
                            "status": "affected",
                            "versionType": "semver",
                            "lessThan": "2.41.4"
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                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:a:n8n:n8n:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.42.0",
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                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "attackRequirements": "PRESENT",
                        "privilegesRequired": "LOW",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "HIGH",
                        "vulnIntegrityImpact": "HIGH",
                        "vulnAvailabilityImpact": "HIGH",
                        "subConfidentialityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "subAvailabilityImpact": "NONE",
                        "baseScore": 7.7,
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            "references": [
                {
                    "url": "https://github.com/n8n-io/n8n/security/advisories/GHSA-5jr4-xmvf-frmj",
                    "tags": [
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                                "timestamp": "2026-10-15T13:44:32.171824Z",
                                "id": "CVE-2026-110842",
                                "options": [
                                    {
                                        "Exploitation": "none"
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                                        "Automatable": "no"
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                                        "Technical Impact": "total"
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                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
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                "title": "CISA ADP Vulnrichment",
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