# Cal.com v5.6.4 — Release & Upgrade Intelligence
- **Product:** Cal.com (https://cal.com)
- **Version:** v5.6.4
- **Released:** Aug 22, 2025
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/calcom/updates/v5.6.4/

## Executive Summary (TL;DR)
Cal.com v5.6.4. Source highlight: fix: Add guests via URL param even if field is hidden

## New Features
- feat: add organizer.id to the BOOKING_CREATED webhook for requires confirmation event bookings
- feat: add hideEventMetadata prop
- feat: add attendee filters to /insights/routing (+ use RoutingFormResponseDenormalized)
- feat: update global feature flag to team feature flag for team booking page cache
- feat: multi Select for "Event Type" in Insights
- feat: add send & verify code flow to booker atom when email verification is turned on

## Bug Fixes
- fix: Add guests via URL param even if field is hidden
- fix: `onBookerStateChange` prop for `Booker` atom
- fix: Event attendees are not showing in the calendar when hideOrganizerEmail is true
- fix: POST v2/bookings - recurrenceCount (with eventType reoccuring enabled) causes lengthInMinutes to be ignored