Auth bypass in N8n-Io N8n
CVE-2026-118676
n8n before 1.123.85, 2.43.5, and 2.44.1 contains an authorization bypass vulnerability that allows member users to use credentials they cannot access by omitting default node parameters. Attackers can save and run workflows where pre-execution checks skip credential slots, causing decrypted credential values to be sent to attacker-chosen destinations.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/n8n-io/n8n/security/advisories/GHSA-v9cx-v88r-42vw (vendor-advisory)
- www.vulncheck.com/advisories/n8n-before-1.123.85-2.43.5-and-2.44.1-credential-p… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-118676?
- CVE-2026-118676 is a high-severity vulnerability in N8n-Io N8n, classified under Incorrect Authorization. CVSS score: 7.1/10. Published 2026-10-28.
- How severe is CVE-2026-118676?
- High severity. CVSS v3 base score is 7.1 out of 10.