Exposure of Resource to Wrong Sphere in n8n - #VU139104
Published: July 22, 2026
Vulnerability identifier: #VU139104
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: N/A
CWE-ID: CWE-668
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: n8n
Affected software:
n8n
n8n
Detailed vulnerability description
The vulnerability allows a remote user to alter other users' code-node executions and affect their confidentiality, integrity, or availability.
The vulnerability exists due to improper isolation in the js task runner module cache when processing code-node executions on a shared runner. A remote user can poison a cached module to alter other users' code-node executions and affect their confidentiality, integrity, or availability.
This is a cross-user isolation break within a single n8n instance and does not constitute a sandbox escape or remote code execution. Only multi-user instances running the js task runner with built-in or external modules enabled are vulnerable.
Remediation
Install security update from vendor's website.