HubSpot OAuth v1 Sunsetting: Immediate Steps for n8n Users

The issue and timeline

HubSpot has notified users that OAuth v1 endpoints will start returning errors on February 16, 2027; the deprecation is driven by security concerns around sensitive data being passed in URLs or query parameters. If your workflows still rely on v1, connections will fail and automated processes that depend on HubSpot APIs could stop without a migration.

Immediate business impact

For teams that use n8n or similar automation platforms, the primary risk is operational downtime: failed syncs, stalled lead flows, and broken automations. There is also a security benefit-migrating avoids exposure of tokens and credentials in logs and history, reducing attack surface. Leaders should treat this as a scheduled migration, not an unknown outage.

Recommended migration steps

1) Inventory: identify all flows, nodes, and systems using HubSpot OAuth v1. 2) Coordinate: schedule updates with engineering and business owners, prioritizing revenue-critical automations. 3) Update credentials: obtain OAuth v2/date-based credentials from HubSpot and replace them in your credential store. 4) Test: validate tokens and API calls in a staging environment before switching production. 5) Monitor: add post-migration alerts to catch token failures early.

Governance and fallback plans

If you rely on n8n Community or a managed n8n cloud, confirm whether the platform will update HubSpot nodes automatically or whether you must reconfigure. Keep a rollback plan and a temporary manual process for critical operations during the cutover. Finally, use this migration as an opportunity to tighten credential rotation, centralize secrets management, and audit integrations for similar deprecation risks.