CVE-2026-103247CWE-639

CVE-2026-103247

High · published October 1, 2026

CVSS v3.1
8.5
EPSS
0%
Percentile
13.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
8.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
CVSS v4.0
5.8 · CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:H/SI:H/SA:H
EPSS
0.00236 · 13.8th percentile
Weakness
CWE-639 · Authorization Bypass Through User-Controlled Key
Published
2026-10-01T15:17Z
References (2)
https://github.com/n8n-io/n8n/security/advisories/GHSA-7gjv-rcf8-x5qc · [email protected]https://www.vulncheck.com/advisories/n8n-before-1.123.80-credential-tampering-via-duplicate-node-ids · [email protected]
EPSS history
Timeline
  • 03 OCT 03:41Z
    EPSS moved — → 0%
    epss
  • 01 OCT 10:41Z
    n8n before 1.123.80 Credential Tampering via Duplicate Node IDs
    cvelistv5