n8n: Race Condition in Git Clone Node Allows Authenticated Users to Achieve Remote Code Execution

HighCVE-2026-65598 · Published Jul 22, 2026 · updated Aug 19, 2026

## Impact A TOCTOU race condition in the Git node's `clone` operation lets an authenticated user bypass its path restrictions by swapping a directory for a symlink after the path is validated but before the clone runs. This plants a crafted repository in the community node directory, which n8n loads as a custom node on the next restart, and since nodes execute JavaScript, this yields arbitrary code execution on the server. Both self-hosted and cloud instances are affected, where authenticated users can create and run workflows using the Git node. ## Patches Users should upgrade to the patched version once available to remediate the vulnerability. ## Workarounds If upgrading is not immediately possible, administrators should consider the following temporary mitigations: - Restrict n8n instance access to fully trusted users only. - Disable the Git node by adding `n8n-nodes-base.git` to the `NODES_EXCLUDE` environment variable. - Restrict network egress from the n8n instance to prevent connections to attacker-controlled git repositories. These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.