Auth bypass in N8n
CVE-2026-59253
n8n before 2.28.0 contains an improper authorization vulnerability allowing authenticated users to assign workflows to folders in other projects. Attackers can bypass project and folder authorization boundaries by supplying crafted request payloads during workflow creation, causing logical integrity violations in target project folder structures.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.0 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (18.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 19th percentile — 18.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- N8n — versions 0, 2.28.0
Weakness classification (CWE)
References
- github.com/n8n-io/n8n/security/advisories/GHSA-2xgm-wc4g-5jvg (vendor-advisory, Mitigation, Vendor Advisory)
- www.vulncheck.com/advisories/n8n-improper-authorization-in-workflow-assignment-… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-59253?
- CVE-2026-59253 is a medium-severity vulnerability in N8n, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 5.0/10. Published 2026-07-08.
- How severe is CVE-2026-59253?
- Medium severity. CVSS v3 base score is 5.0 out of 10.