{"id":"CVE-2026-103246","title":"n8n versions before 2.39.6 and 2.40.0 before 2.40.1 fail to validate credential ownership during inline agent node-tool introspection","summary":"n8n versions before 2.39.6 and 2.40.0 before 2.40.1 fail to validate credential ownership during inline agent node-tool introspection. Attackers can reference arbitrary credential IDs to decrypt and exfiltrate plaintext secrets to attack…","severity":"high","cvss":7.7,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","cwe":["CWE-639"],"vendor":"n8n-io","product":"n8n","affected":["n8n < 2.39.6","n8n >= 2.40.0 < 2.40.1"],"published":"2026-10-01","updated":"2026-10-01","sourceUpdated":"2026-10-01T11:17:18.013","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-103246","references":[{"url":"https://github.com/n8n-io/n8n/security/advisories/GHSA-9rhv-fhr8-7q5r","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/n8n-before-2.39.6-and-2.40-x-before-2.40.1-credential-disclosure-via-node-tool-introspection","label":"disclosure@vulncheck.com"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-10-01T11:42:53.798Z","slug":"CVE-2026-103246","body":"## Overview\n\nn8n versions before 2.39.6 and 2.40.0 before 2.40.1 fail to validate credential ownership during inline agent node-tool introspection. Attackers can reference arbitrary credential IDs to decrypt and exfiltrate plaintext secrets to attacker-controlled hosts without ownership verification.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":42,"depthScoreParts":{"impact":42.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}