# Cal.com v5.8.7 — Release & Upgrade Intelligence
- **Product:** Cal.com (https://cal.com)
- **Version:** v5.8.7
- **Released:** Oct 29, 2025
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/calcom/updates/v5.8.7/

## Executive Summary (TL;DR)
Cal.com v5.8.7. Source highlight: chore: add changeset for new atoms release

## New Features
- chore: add changeset for new atoms release
- feat: Add endpoint to add attendees to existing bookings
- feat: add no-show hosts and csat graphs on Insights
- feat: update Office365 getMainTimeZone to handle new Graph API format and convert Windows timezones to IANA by @devin-ai-integration[bot] in https://github.com/calcom/cal.com/pull/23763
- chore: Adds a users.uuid column
- chore: add indexes for user delete

## Bug Fixes
- fix(insights): convert string filter values to numbers for integer columns
- fix: seed script command
- fix: added empty view component to call history page
- fix(event-type): remove spinner flash before skeleton loads (#23678)
- fix: description label is not focusing on new event-type create modal
- fix: Make no-show dialog scrollable