{"schema":"threatline.record/2","record":{"id":"CVE-2026-110848","aliases":["GHSA-3p2g-2wpm-8h3g"],"summary":"n8n before 1.123.83, 2.41.4, and 2.42.1 Prototype Pollution via AI Workflow Builder Connection Merge","details":"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.","categories":["Frameworks"],"product":"n8n","vendor":"n8n-io","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-110848","source_modified_at":"2026-10-16T17:14:56.072Z","fetched_at":"2026-10-23T18:48:36.087640Z","product":"n8n","vendor":"n8n-io","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"}],"defaultStatus":"unaffected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-110848","source_modified_at":"2026-10-16T17:14:56.072Z","fetched_at":"2026-10-23T18:48:36.087640Z","package":{"name":"n8n","ecosystem":null},"version":"1.123.83","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-110848","source_modified_at":"2026-10-16T17:14:56.072Z","fetched_at":"2026-10-23T18:48:36.087640Z","package":{"name":"n8n","ecosystem":null},"version":"2.41.4","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-110848","source_modified_at":"2026-10-16T17:14:56.072Z","fetched_at":"2026-10-23T18:48:36.087640Z","package":{"name":"n8n","ecosystem":null},"version":"2.42.1","basis":"first unaffected version stated in the CVE record"}],"cvss":6,"severity":"Medium","kev":{"listed":false},"epss":{"probability":0.00312,"percentile":0.22924,"score_date":"2026-10-23"},"published_at":"2026-10-14T22:52:23.952Z","modified_at":"2026-10-16T17:14:56.072Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-110848","fetched_at":"2026-10-23T18:48:36.087640Z","source_modified_at":"2026-10-16T17:14:56.072Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-110848","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/n8n-io/n8n/security/advisories/GHSA-3p2g-2wpm-8h3g","tags":["vendor-advisory"]},{"source":"CVE List","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","tags":["third-party-advisory"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"no","technical_impact":"partial","assessed_at":"2026-10-16T16:31:15.592926Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-16T17:14:56.072Z","content_hash":"e1d8e73eaea2c38529f3fc064f4c100c310cc711edab97c20bba35e41796180e"}}