Upgrade your Chatflows custom code snippets from Node 18.x or 20.x to Node 24.x

What it is

The Node 18.x and 20.x runtimes will be deprecated for Chatflows custom code snippets on July 13, 2026. Both versions are reaching end of life and no longer receive security patches, so HubSpot is moving these snippets to Node 24.x, the current long term support release. This is in development and affects Data Hub Professional and Enterprise.

Why it matters

This is narrow, but it comes with a date and a small amount of homework. If you run custom code in chatflows, the snippets need to move to Node 24.x before July 13 to keep them on a supported, patched runtime. Most teams will not have any custom code in scope, but the ones that do should not let this slip, because an unsupported runtime is a security exposure, not just a deprecation notice.