Changelog

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About Versioning

• MAJOR version (X.0.0): Incompatible API changes
• MINOR version (0.X.0): New functionality in a backwards-compatible manner
• PATCH version (0.0.X): Backwards-compatible bug fixes

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How to Use This Changelog

• Added: New features
• Changed: Changes to existing functionality
• Deprecated: Features that will be removed in future versions
• Removed: Features that were removed
• Fixed: Bug fixes
• Security: Security-related changes

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Staying Updated

• Watch the GitHub repository for release notifications
• Follow @cvat_ai on social media
• Check the release page
• Subscribe to the mailing list

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Recent Releases

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[2.58.0] - 2026-02-23

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Added

• Added a new annotation filter to find rotated bounding boxes and ellipses

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Fixed

• Memory leaks on 3D canvas because of unreleased GL resources

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[2.57.0] - 2026-02-17

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Added

• Ability to change zOrder of an object one by one, using buttons or shortcuts

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Fixed

• Creation of extra “create” and “update” events on children summary field updates
• Fixed a crash on fetching an empty related image chunk from cloud storage
• Fixed creating a task from attached file share with mixed images and directories

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[2.56.0] - 2026-02-02

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Added

• Option to sort annotations by label
• Score visualization in UI with virtual “Votes” attribute
• Navigation between shapes with Tab/Shift+Tab shortcuts
• Review mode now supports editing objects
• Double-clicking object in sidebar centers it on canvas
• Keyboard shortcut to switch object appearance color mode

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Changed

• Increased maximum annotation guide assets from 30 to 150
• Consensus merge preserves all shapes with their scores

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Removed

• Consensus quorum setting (replaced with score filtering)

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[2.55.0] - 2026-01-19

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Added

• Option to download quality report as confusion matrix CSV

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Fixed

• Reading HTTP request data in chunks for TUS PATCH requests
• Return 404 for HEAD requests after TUS upload completion
• Manifest files uploaded with videos no longer ignored
• Improved Ultralytics YOLO Classification import performance

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Security

• Fixed XSS vulnerabilities related to skeleton SVG images
• Upgraded OPA to version 1.12.2
• Users with staff status can no longer change their own permissions

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[2.50.0] - 2025-11-26

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Added

• Kvrocks PVC configuration via annotations (Helm)
• VolumeAttributesClass support for storage

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Changed

• Changed API token expiration date format from ISO to DD/MM/YYYY
• Files in data/tasks/<id> no longer included in backups
• Updated Traefik to v3.6.x

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Fixed

• Excessive GET /api/users requests on task page
• Actions menu could be opened twice on resource cards
• Quality conflicts display in consensus replica review mode
• Cloud storage status error handling

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[2.48.0] - 2025-10-27

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Added

• API access tokens support
• CVAT_ACCESS_TOKEN environment variable for CLI authentication
• SDK can use API tokens for authentication
• Configuration option for maximum job limit per task

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Fixed

• Tracks no longer leak to other jobs on task export
• Cloud storage value persistence after organization transfer
• Memory usage improvements for annotation operations

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[2.44.0] - 2025-09-01

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Added

• Bulk actions for multiple resource operations:
  • Multi-select using Ctrl/Shift or Select All button
  • Supported: Tasks, Jobs, Projects, Requests, Members, Webhooks, Cloud Storages
  • Operations: Export, Backup, Delete, Download, Change assignee/state/stage/role
• Auto-annotation functions can now output tags (SDK)
• Ability to move projects and tasks between organizations
• Organization transfer as bulk action
• Ability to replace cloud storage for tasks
• Lightweight backup option (excludes media for cloud-storage tasks)

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Changed

• Updated Yarn from 1.22.22 to 4.9.2
• Improved SDK custom request handling and documentation
• CLI task backup/export now uses server-generated filenames by default
• Improved error messages for image chunk save failures

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[2.43.0] - 2025-08-07

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Added

• Django command to remove user with all resources

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Changed

• Better validation of fields in raw labels editor
• Optimized preview requests sent sequentially to reduce server load

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Fixed

• Issue dialogs appearing outside visible area near edges
• Job meta including deleted_frames outside the job

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[2.42.0] - 2025-07-29

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Added

• Auto-annotation tracker function interface (SDK/CLI)
• TaskDataset supports video chunks with PRELOAD_ALL policy
• Support for cgroup v2 for calculating threads

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Fixed

• Bumped Python runtime for SAM Nuclio function from 3.8 to 3.10
• User login issues with case-sensitive emails
• Cloud storage image download threading

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Security

• Added missing email verification check for Basic HTTP authentication

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[2.41.0] - 2025-07-09

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Added

• Page size selector for resource pages
• Inline editing of assignee, state, and stage from card views

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Changed

• Improved email templates for confirmation and invitations
• Reduced log clutter in CLI function run-agent command
• Default Django cache backend changed from LocMem to Redis

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Deprecated

• Token authentication (Server API)

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[2.40.0] - 2025-06-25

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Added

• Serverless tracker functions can accept non-rectangle shapes
• CVAT_CACHE_ITEM_MAX_SIZE option to limit data chunk size
• Server tracks last_activity_date of users
• Username filtration in Grafana dashboards

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Changed

• Updated zooming algorithm for smoother operation
• Kvrocks configured for auto compaction at scheduled time
• Endpoints check shape point/element counts appropriately

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Security

• Added missing file name validation for TUS protocol imports

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Major Features Since 2.0

• Consensus annotations: Merge annotations from multiple annotators
• Quality control system: Compare annotations and calculate metrics
• Bulk operations: Perform actions on multiple resources at once
• API access tokens: New secure token system with expiration
• Video chapters: Display and navigate using video chapters
• Score visualization: View annotation consensus scores
• Cloud storage improvements: Better integration and performance
• 3D annotation enhancements: Improved point cloud support
• Organization management: Multi-tenancy features
• Auto-annotation improvements: Better SDK for custom models
• Performance optimizations: Reduced memory usage across the board
• Helm chart improvements: Better Kubernetes deployment options

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Migration Guides

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Upgrading from 2.x to Latest

cd cvat
git pull origin develop
docker compose down
docker compose pull
docker compose up -d

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Breaking Changes

• 2.48+: Token authentication deprecated, use access tokens instead
• 2.44+: Yarn updated to v4, may require dependency updates
• 2.0+: Cannot upgrade directly from versions prior to 2.0

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Deprecated Features

• Token authentication: Use access tokens instead
• GET /api/events: Use POST /api/events/export instead
• Various background request status checking endpoints (use /api/requests)

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Full Changelog

• All 100+ versions and releases
• Detailed change descriptions
• Links to pull requests and issues
• Security advisories
• Complete removed/deprecated feature lists

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Release Schedule

• Minor versions: Every 2-4 weeks
• Patch versions: As needed for critical fixes
• Major versions: When significant breaking changes occur

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Contributing to Changelog

scriv create --edit

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Questions?

• Check GitHub Releases
• Ask on Discord or Gitter
• Review the documentation