CVE-2026-103247 n8n before 1.123.80 Credential Tampering via Duplicate Node IDs
Attackers with editor access can bypass credential tamper guards via duplicate node IDs to steal secrets and redirect them to attacker-controlled hosts.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-103247?
CVE-2026-103247 is a medium-severity vulnerability in n8n-io n8n, published on 1 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
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.
Weakness: CWE-639
Which versions are affected by CVE-2026-103247?
How do I fix CVE-2026-103247?
No fix has been published for CVE-2026-103247 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-103247 being exploited?
There is no known exploitation of CVE-2026-103247 in the wild and no public exploit code.
Sources
Also known as GHSA-7gjv-rcf8-x5qc, GHSA-v9vf-c827-9m93.