Vulnerability · Published Oct 1, 2026 · Assigned by VulnCheck
CVE-2026-103247n8n before 1.123.80 Credential Tampering via Duplicate Node IDs
High 8.5
In plain English
A high-severity authorization bypass via user-controlled key in n8n from n8n-io. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 15% of all known vulnerabilities).
Severity (CVSS 3.1)8.5High
Exploit odds (30 days)0.2%top 85.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
Weakness: CWE-639 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
References
- GitHub Security Advisory (GHSA-7gjv-rcf8-x5qc) vendor-advisory
- VulnCheck Advisory: n8n before 1.123.80 Credential Tampering via Duplicate Node IDs third-party-advisory