{"id":"CVE-2026-110848","revision":"2c8e8a8e46e84be19dfb2bddf3facd47","records":[{"revision":"2c8e8a8e46e84be19dfb2bddf3facd47","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-110848","aliases":[],"title":"n8n before 1.123.83, 2.41.4, and 2.42.1 Prototype Pollution via AI Workflow Builder Connection Merge","description":"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.","state":0,"publishedAt":"2026-10-14T22:52:23.952+00:00","modifiedAt":"2026-10-16T17:14:56.072+00:00","affected":[{"ecosystem":"Vendor product","name":"n8n","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"n8n-io\",\n                    \"product\": \"n8n\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"packageURL\": \"pkg:npm/n8n\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThan\": \"1.123.83\"\n                        },\n                        {\n                            \"version\": \"2.0.0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThan\": \"2.41.4\"\n                        },\n                        {\n                            \"version\": \"2.42.0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThan\": \"2.42.1\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"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","score":6,"severity":"MEDIUM"}],"references":["https://github.com/n8n-io/n8n/security/advisories/GHSA-3p2g-2wpm-8h3g","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"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-110848","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-110848","identifiers":["CVE-2026-110848"]},"retained":false,"historicalAffected":[]}],"coverage":[]}