| Component | n8n |
| Severity | high (CVSS 7.7) |
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N |
| Published (NVD) | 2026-10-01 |
| Last modified | 2026-10-06 |
| Affected versions | < 2.39.6 read from the advisory text: NVD has not published CPE data yet |
| Fixed in | 2.39.6 |
| Weakness | CWE-639 |
| CISA KEV | not listed |
NVD 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.
What to do
- Upgrade n8n to
2.39.6or later. - Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
- NVD: CVE-2026-103246
- https://github.com/n8n-io/n8n/security/advisories/GHSA-9rhv-fhr8-7q5r
- https://www.vulncheck.com/advisories/n8n-before-2.39.6-and-2.40-x-before-2.40.1-credential-disclosure-via-node-tool-introspection
Read more
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