{"id":"CVE-2026-103246","published":"2026-10-01T11:17:17.887","lastModified":"2026-10-06T01:16:32.187","description":"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 attacker-controlled hosts without ownership verification.","cvssScore":7.7,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","cwes":["CWE-639"],"vendors":[],"products":[],"references":[{"url":"https://github.com/n8n-io/n8n/security/advisories/GHSA-9rhv-fhr8-7q5r","tags":[]},{"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","tags":[]}],"exploitRefs":[{"url":"https://github.com/n8n-io/n8n/security/advisories/GHSA-9rhv-fhr8-7q5r","tags":[]}],"hasPoc":true,"ai":{"summary":"The flaw allows attackers to decrypt and exfiltrate plaintext secrets by referencing arbitrary credential IDs, bypassing ownership verification.","exploitability":"Exploitation is relatively easy given the lack of ownership verification. Attackers need access to the inline agent node-tool introspection feature.","blast_radius":"If exploited, the impact is high as it can lead to complete compromise of sensitive secrets.","remediation":"Upgrade to n8n version 2.39.6 or later, or 2.40.1 or later, to address the vulnerability.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["auth-bypass","secrets-exfiltration","web"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-10-09T08:45:16.245Z"}}