megachangelog
Announcement2026.05

May 2026 Rollup

HubSpot released monthly updates including enhancements to Breeze Assistant, a new useCrmSearch hook for UI extensions, stage calculated properties for custom objects, and improvements to HubSpot CLI, blog author attribution, and IP range webhooks.

This month brings a set of updates aimed at making everyday building better. Breeze Assistant steps further into your workflows, a new useCrmSearch hook shipped for UI extensions, stage calculated properties available for custom objects and the HubSpot CLI got a fresh round of improvements — plus updates to blog author attribution, IP range webhooks, and more. Read on below for the details.

breeze-assistantui-extensionscustom-objectscliwebhooks

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Security

HubSpot-hosted domains moving to TLS 1.2 minimum

HubSpot will automatically update the minimum TLS version for HubSpot-hosted domains from TLS 1.0 or 1.1 to TLS 1.2 on October 14th, enhancing security for all hosted domains.

securitytlsdomainsencryption
BreakingFall 2026

End of Support for v1-v3 APIs and Legacy Apps

HubSpot is ending support for v1-v3 APIs, legacy public apps, and legacy private apps effective September 2027. Customers and partners have a 12-month window from the announcement to migrate to supported alternatives.

apideprecationbreaking-changemigration
Announcement2026.09

Fall 2026 Spotlight - Developer and Builder Updates

HubSpot's Fall 2026 release introduces new features on Developer Platform 2026.09, including updated APIs, new beta APIs, and AI builder tools. This changelog covers non-breaking updates; see the separate breaking changes article for legacy API deprecations.

apideveloper-platformai-builderbeta
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