CVE-2026-103247

n8n before 1.123.80 Credential Tampering via Duplicate Node IDs

5.8 Medium

n8n versions before 1.123.80 contain a credential tampering vulnerability where duplicate node IDs bypass the workflow credential tamper guard. Attackers with editor access to shared workflows can exploit mismatched node ID and name matching to retain victim credentials and redirect secrets to attacker-controlled hosts.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: Low
Integrity: None
Availability: None

Exploit likelihood

0.24%Unchanged since Oct 2, 2026

What each source reports

CVE List Score used 5.8

n8n before 1.123.80 Credential Tampering via Duplicate Node IDs

Record: CVE-2026-103247
CVSS 4.0: 5.8 MediumCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:H/SI:H/SA:H
CVSS 3.1: 8.5 HighCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Weakness: CWE-639
Updated: 2026-11-02

EUVDEUVD-2026-90751 5.8

Record: EUVD-2026-90751
CVSS 4.0: 5.8 MediumCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:H/SI:H/SA:H
Updated: 2026-11-02

GitHub AdvisoriesGHSA-v9vf-c827-9m93 5.8

n8n versions before 1.123.80 contain a credential tampering vulnerability where duplicate node...

Record: GHSA-v9vf-c827-9m93
CVSS 4.0: 5.8 MediumCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 8.5 HighCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Weakness: CWE-639
Updated: 2026-11-02

NVD 5.8

Record: CVE-2026-103247
CVSS 4.0: 5.8 MediumCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 8.5 HighCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Weakness: CWE-639
Updated: 2026-11-02

OSV 5.8

n8n before 1.123.80 Credential Tampering via Duplicate Node IDs

Record: CVE-2026-103247
CVSS 4.0: 5.8 MediumCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:H/SI:H/SA:H
Weakness: CWE-639
Updated: 2026-11-02

Affected products

n8n-io n8n

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-103247 is a medium vulnerability (CVSS 5.8) in N8n-io N8n, published October 1, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.24%, the 14th percentile. No source names a fixed version.