{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-110848",
        "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "state": "PUBLISHED",
        "assignerShortName": "VulnCheck",
        "dateReserved": "2026-10-14T22:12:22.055Z",
        "datePublished": "2026-10-14T22:52:23.952Z",
        "dateUpdated": "2026-10-16T17:14:56.072Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
                "shortName": "VulnCheck",
                "dateUpdated": "2026-10-14T22:52:23.952Z"
            },
            "datePublic": "2026-09-30T00:00:00.000Z",
            "title": "n8n before 1.123.83, 2.41.4, and 2.42.1 Prototype Pollution via AI Workflow Builder Connection Merge",
            "descriptions": [
                {
                    "lang": "en",
                    "value": "n8n before 1.123.83, 2.x before 2.41.4, and 2.42.x before 2.42.1 contains a prototype pollution vulnerability in the AI workflow builder, which merges workflow connections using node names as object members without checking for reserved keys. Authenticated users can create nodes named __proto__ through the API and invoke the connect-nodes operation to pollute the global object prototype, disrupting the instance until restart."
                }
            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "description": "Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')",
                            "cweId": "CWE-1321",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "vendor": "n8n-io",
                    "product": "n8n",
                    "defaultStatus": "unaffected",
                    "packageURL": "pkg:npm/n8n",
                    "versions": [
                        {
                            "version": "0",
                            "status": "affected",
                            "versionType": "semver",
                            "lessThan": "1.123.83"
                        },
                        {
                            "version": "2.0.0",
                            "status": "affected",
                            "versionType": "semver",
                            "lessThan": "2.41.4"
                        },
                        {
                            "version": "2.42.0",
                            "status": "affected",
                            "versionType": "semver",
                            "lessThan": "2.42.1"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:a:n8n:n8n:*:*:*:*:*:*:*:*",
                                    "versionEndExcluding": "1.123.83"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:a:n8n:n8n:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.0.0",
                                    "versionEndExcluding": "2.41.4"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:a:n8n:n8n:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.42.0",
                                    "versionEndExcluding": "2.42.1"
                                }
                            ]
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "format": "CVSS",
                    "cvssV4_0": {
                        "version": "4.0",
                        "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "attackRequirements": "PRESENT",
                        "privilegesRequired": "LOW",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "NONE",
                        "vulnIntegrityImpact": "NONE",
                        "vulnAvailabilityImpact": "HIGH",
                        "subConfidentialityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "subAvailabilityImpact": "NONE",
                        "baseScore": 6,
                        "baseSeverity": "MEDIUM"
                    }
                }
            ],
            "references": [
                {
                    "url": "https://github.com/n8n-io/n8n/security/advisories/GHSA-3p2g-2wpm-8h3g",
                    "tags": [
                        "vendor-advisory"
                    ],
                    "name": "GitHub Security Advisory (GHSA-3p2g-2wpm-8h3g)"
                },
                {
                    "name": "VulnCheck Advisory: n8n before 1.123.83, 2.41.4, and 2.42.1 Prototype Pollution via AI Workflow Builder Connection Merge",
                    "tags": [
                        "third-party-advisory"
                    ],
                    "url": "https://www.vulncheck.com/advisories/n8n-before-1.123.83-2.41.4-and-2.42.1-prototype-pollution-via-ai-workflow-builder-connection-merge"
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "value": "vonypeto",
                    "type": "reporter"
                }
            ],
            "x_generator": {
                "engine": "vulncheck-endgame"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-10-16T16:31:15.592926Z",
                                "id": "CVE-2026-110848",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-10-16T17:14:56.072Z"
                }
            }
        ]
    }
}