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.
Published: 2026-10-01
Score: 8.3 High
EPSS: n/a
KEV: No
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Thu, 01 Oct 2026 11:00:00 +0000

Type Values Removed Values Added
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.
Title n8n before 2.39.6 and 2.40.x before 2.40.1 Credential Disclosure via Node-Tool Introspection
First Time appeared N8n
N8n n8n
Weaknesses CWE-639
CPEs cpe:2.3:a:n8n:n8n:*:*:*:*:*:*:*:*
Vendors & Products N8n
N8n n8n
References
Metrics cvssV3_1

{'score': 7.7, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N'}

cvssV4_0

{'score': 8.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N'}

Subscriptions

N8n N8n
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-01T10:41:53.491Z

Reserved: 2026-09-30T10:52:32.248Z

Link: CVE-2026-103246

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2026-10-01T11:17:17.887

Modified: 2026-10-01T11:17:18.013

Link: CVE-2026-103246

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-01T12:30:07Z

Weaknesses
  • CWE-639

    Authorization Bypass Through User-Controlled Key