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pack

v0.40.6 Breaking

This release includes breaking changes for platform teams planning a safe upgrade.

Published 18d Build & Package
✓ No known CVEs patched
Read the diff → Tool health → What is this tool? →

✓ No known CVEs patched in this version

Topics

buildpacks cloud-native-buildpacks cncf

Summary

AI summary

Add heroku/builder:26 as a trusted builder and fix builder inspect showing known builders as untrusted.

Changes in this release

Feature Medium

Fix builder inspect showing known builders as untrusted

Fix builder inspect showing known builders as untrusted

Source: llm_adapter@2026-05-21

Confidence: high

Feature Medium

Add heroku/builder:26 as a trusted builder

Add heroku/builder:26 as a trusted builder

Source: llm_adapter@2026-05-21

Confidence: high

Full changelog

Prerequisites

  • A container runtime such as Docker or podman must be available to execute builds.

Install

For instructions on installing pack, see our installation docs.

Run

Run the command pack.

You should see the following output

CLI for building apps using Cloud Native Buildpacks

Usage:
  pack [command]

Available Commands:
  build                 Generate app image from source code
  builder               Interact with builders
  buildpack             Interact with buildpacks
  extension             Interact with extensions
  config                Interact with your local pack config file
  inspect               Show information about a built app image
  stack                 (deprecated) Interact with stacks
  rebase                Rebase app image with latest run image
  sbom                  Interact with SBoM
  completion            Outputs completion script location
  report                Display useful information for reporting an issue
  version               Show current 'pack' version
  help                  Help about any command

Flags:
      --force-color   Force color output
  -h, --help          Help for 'pack'
      --no-color      Disable color output
  -q, --quiet         Show less output
      --timestamps    Enable timestamps in output
  -v, --verbose       Show more output
      --version       Show current 'pack' version

Use "pack [command] --help" for more information about a command.

Info

Builders created with this release of the pack CLI contain lifecycle v0.21.0 by default.

Changelog

Features

  • Fix builder inspect showing known builders as untrusted (#2571 by @runesoerensen)
  • Add heroku/builder:26 as a trusted builder (#2569 by @runesoerensen)

Contributors

We'd like to acknowledge that this release wouldn't be as good without the help of the following amazing contributors:

@runesoerensen

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About pack

CLI for building apps using Cloud Native Buildpacks

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Related context

Beta — feedback welcome: [email protected]