GHSA-35jj-42hp-8gmq: n8n: Anonymous Approval-Gate Bypass via Reused resumeToken over the Chat WebSocket

Summary

n8n's `/chat` WebSocket route resumed paused executions from a resume token without checking that the target node was a chat node. Because n8n gives that token to anonymous form submitters, an unauthenticated party could present it on the chat route and release an execution waiting at an approval gate.

Mitigation

Fixed in n8n versions 2.37.7 and 2.38.2; upgrade to one of these or later. If upgrading is not immediately possible, the source suggests restricting instance access to fully trusted users, avoiding workflows that combine a Form Trigger with non-chat approval gates on publicly accessible instances, and auditing recent executions of such workflows for completions without a corresponding approval callback. The source states these workarounds do not fully remediate the risk and are only short-term measures.

Affected packages in the Exposure Registry

Matched by package name and ecosystem. Each entry shows whether the package delegates to a language model and how many tracked packages depend on it.

• n8nnpmDeclares an LLM dependency

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