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9.4

n8n may execute unauthorized code via vm2

published 9 days ago
Summary

The n8n workflow tool includes vm2 version 3, which has a flaw that can let specially crafted code escape its safe environment and run on the host system. This could allow attackers to run commands or access sensitive information. Upgrade n8n to a version that uses a patched vm2 or replace the vm2 component with a secure version as soon as possible.

What to do
  • Update cleanstart n8n to version 2.28.0-r5.
Affected software
Ecosystem VendorProductAffected versions
CleanStart cleanstart n8n < 2.28.0-r5
Fix: upgrade to 2.28.0-r5
Original advisory text
vm2 versions 3
Security vulnerability affects the n8n package. vm2 versions 3.
References
Fix within
Internet-facing 14 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit (estimated)
  • Gives an attacker full control (estimated)
Severity
9.4 Critical
Timeline
Published10 Oct 2026
Updated10 Oct 2026
First seen10 Oct 2026
Sources
CLEANSTART-2026-SJ12974 · OSV
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