High severity · published Oct 1, 2026
CVE-2026-103247
n8n before 1.123.80 Credential Tampering via Duplicate Node IDs
8.5
CVSS
0.2%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack vector
Network
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 15% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
N8
n8n · n8n-io
before 1.123.80 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-103247
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-103247
vendor-advisory
https://github.com/n8n-io/n8n/security/advisories/GHSA-7gjv-rcf8-x5qc
third-party-advisory
https://www.vulncheck.com/advisories/n8n-before-1.123.80-credential-tampering-via-duplicate-node-ids
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