{"id":"CVE-2026-110848","title":"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 …","summary":"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 …","severity":"medium","cvss":6,"cvssVector":"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","cwe":["CWE-1321"],"vendor":"n8n-io","product":"n8n","affected":["n8n < 1.123.83","n8n >= 2.0.0 < 2.41.4","n8n >= 2.42.0 < 2.42.1"],"published":"2026-10-14","updated":"2026-10-16","sourceUpdated":"2026-10-16T18:17:33.780","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-110848","references":[{"url":"https://github.com/n8n-io/n8n/security/advisories/GHSA-3p2g-2wpm-8h3g","label":"disclosure@vulncheck.com"},{"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","label":"disclosure@vulncheck.com"}],"tags":["nvd","cve.org"],"epss":0.00312,"epssPercentile":0.23974,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-16T16:31:15.592926Z"},"cvssSource":"cna","ingestedAt":"2026-10-15T00:02:07.177Z","slug":"CVE-2026-110848","body":"## Overview\n\nn8n 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":33,"depthScoreParts":{"impact":33,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":221995,"id":"CVE-2026-110848","ts":1792039700565,"field":"cvss","old":null,"new":"6"},{"seq":221994,"id":"CVE-2026-110848","ts":1792039700565,"field":"severity","old":"none","new":"medium"}]}