Time-of-check Time-of-use (TOCTOU) Race Condition Affecting n8n-nodes-base package, versions <1.121.40>=2.0.0-rc.0 <2.29.7>=2.30.0 <2.30.1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JS-N8NNODESBASE-18343350
- published28 Jul 2026
- disclosed22 Jul 2026
- creditUnknown
Introduced: 22 Jul 2026
NewCVE-2026-65598 (opens in a new tab)How to fix?
Upgrade n8n-nodes-base to version 1.121.40, 2.29.7, 2.30.1 or higher.
Overview
n8n-nodes-base is a Base nodes of n8n
Affected versions of this package are vulnerable to Time-of-check Time-of-use (TOCTOU) Race Condition via a race condition in the clone action. An attacker can execute arbitrary code on the server by exploiting a time-of-check to time-of-use (TOCTOU) issue, swapping a directory for a symlink after path validation but before the clone operation, which results in a crafted repository being loaded and executed as a custom node on the next restart.
Workaround
This vulnerability can be mitigated by restricting instance access to fully trusted users, disabling the Git node by adding n8n-nodes-base.git to the NODES_EXCLUDE environment variable, or restricting network egress to prevent connections to attacker-controlled repositories.