n8n before 2.42.6, 2.43.3 and 3.0.1 Code Execution Outside Task Runner Isolation via Deprecated Function Nodes

Summary

n8n before 2.42.6, 2.43.x before 2.43.3, and 3.x before 3.0.1 contains a remote code execution vulnerability via deprecated Function, Function Item, and LangChain Code nodes running outside task runner isolation. Authenticated users who can create, modify, or import workflows naming these hidden node types can execute JavaScript in the n8n main process.

Remediation

1. Inventory every n8n-io n8n deployment, including staging.
2. Upgrade n8n-io n8n to the fixed version for your release line, listed under Affected versions.
3. Confirm the running version after the upgrade.

References

• Patchhttps://github.com/n8n-io/n8n/commit/ea8417e29ad6f8b981d9a04b17283d5d77f2b5bb
• Advisoryhttps://abraxaslabs.tech/research/n8n-function-vm2
• Advisoryhttps://github.com/n8n-io/n8n/security/advisories/GHSA-9p7v-45m2-wxgj
• Advisoryhttps://www.vulncheck.com/advisories/n8n-before-2.42.6-2.43.3-and-3.0.1-code-execution-outside-task-runner-isolation-via-deprecated-function-nodes
• Referencehttps://github.com/n8n-io/n8n
• Referencehttps://github.com/n8n-io/n8n/blob/[email protected]/packages/nodes-base/nodes/Function/Function.node.ts#L167
• Referencehttps://github.com/n8n-io/n8n/releases/tag/[email protected]
• Referencehttps://github.com/n8n-io/n8n/releases/tag/[email protected]
• Referencehttps://github.com/n8n-io/n8n/releases/tag/[email protected]