Improper access control in n8n - #VU140999
Published: August 5, 2026
Vulnerability identifier: #VU140999
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to read and overwrite arbitrary local files on the n8n host.
The vulnerability exists due to improper access control in the Snowflake node when processing free-form Execute Query input. A remote user can submit queries containing client-side commands to read and overwrite arbitrary local files on the n8n host.
Exploitation requires usable Snowflake credentials.
Affected software
n8n
Remediation
Install security update from vendor's website.
n8n - addressed in versions 1.123.69, 2.33.4, 2.34.1