{"uuid": "9a5cb8eb-63d1-416a-ac64-67f17d5e0e99", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2026-21858", "type": "seen", "source": "https://github.com/rapid7/metasploit-framework/blob/master/modules/auxiliary/gather/ni8mare_cve_2026_21858.rb", "content": "{\"actions\": [{\"description\": \"Create an admin JWT session key by reading out secrets\", \"name\": \"EXTRACT_SESSION\"}, {\"description\": \"Read an arbitrary file from the target\", \"name\": \"READ_FILE\"}], \"aliases\": [], \"arch\": \"\", \"author\": [\"dor attias\", \"msutovsky-r7\"], \"autofilter_ports\": [80, 8080, 443, 8000, 8888, 8880, 8008, 3000, 8443], \"autofilter_services\": [\"http\", \"https\"], \"check\": false, \"default_credential\": false, \"description\": \"This module exploits CVE-2026-21858, a critical unauthenticated remote code execution vulnerability in n8n workflow automation platform versions 1.65.0 through 1.120.x. The vulnerability, dubbed \\\"Ni8mare\\\", is a content-type confusion flaw in webhook request handling that allows attackers to achieve arbitrary file read.\", \"disclosure_date\": null, \"fullname\": \"auxiliary/gather/ni8mare_cve_2026_21858\", \"is_install_path\": true, \"mod_time\": \"2026-02-16 15:48:02 +0000\", \"name\": \"n8n arbitrary file read\", \"needs_cleanup\": false, \"notes\": {\"Reliability\": [], \"SideEffects\": [\"ioc-in-logs\"], \"Stability\": [\"crash-safe\"]}, \"path\": \"/modules/auxiliary/gather/ni8mare_cve_2026_21858.rb\", \"platform\": \"\", \"post_auth\": true, \"rank\": 300, \"ref_name\": \"gather/ni8mare_cve_2026_21858\", \"references\": [], \"rport\": 80, \"session_types\": false, \"targets\": null, \"type\": \"auxiliary\"}", "creation_timestamp": "2026-09-08T06:47:19.395913Z"}