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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.

• https://github.com/n8n-io/n8n/security/advisories/GHSA-9p7v-45m2-wxgj vendor-advisory
• https://github.com/n8n-io/n8n/commit/ea8417e29ad6f8b981d9a04b17283d5d77f2b5bb patch
• https://github.com/n8n-io/n8n/blob/n8n@2.42.0/packages/nodes-base/nodes/Function/Function.node.ts#L167 technical-description
• https://github.com/n8n-io/n8n/releases/tag/n8n@2.42.6 release-notes
• https://github.com/n8n-io/n8n/releases/tag/n8n@2.43.3 release-notes
• https://github.com/n8n-io/n8n/releases/tag/n8n@3.0.1 release-notes
• https://abraxaslabs.tech/research/n8n-function-vm2 third-party-advisory
• https://github.com/n8n-io/n8n product
• https://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 third-party-advisory