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.

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)

EPSS: 0.002 (6.3th percentile) — read the EPSS interpretation.

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.

Affected products

N8n — versions 0, 2.28.0

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

disclosure@vulncheck.com (vendor-advisory, Mitigation, Vendor Advisory)
disclosure@vulncheck.com (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.