Multiplatform docker images for cfn-lint (and a v1.52 schema fix)

Sat, 27 Jun 2026 09:00:00 +0000

A while back we wrote about our automatically updated docker image for cfn-lint - a public, daily-rebuilt image for cfn-lint that fills the gap left by the lack of an official one. Two changes have just landed in that build, and both are worth a few words: the images are now multiplatform, and we have fixed a problem that, from cfn-lint v1.52.0 onwards, left the image unable to recognise any resources.

Automatically updated docker image for cfn-lint

Thu, 18 Apr 2024 15:00:00 +0000

If you’re using CloudFormation, you probably know about cfn-lint - a linting tool created by the CloudFormation team to validate templates against the schema and best practices. Validating each template before deployment is in itself actually considered a best practice by AWS. However, simply using validate-template in the Console or CLI only validates the basic syntax of the template, not the actual contents and resource specification. That’s where using a linter like cfn-lint can be helpful to make sure you’re not making any obvious mistakes or going against best practices in your resources.

You can use cfn-lint in a number of ways during development, including simply within command-line, using git pre-commit hooks or as a plugin to your IDE. All those options, while helpful in day-to-day work, do not establish code quality standards for your overall codebase. To do that, it’s ideal to include linting as part of CI/CD pipeline and/or pull/merge-requests approval process.

That is where you can come across a hurdle: cfn-lint does not have an official, up-to-date docker image

cfn-lint on Mysterious Code - Senior AWS, DevOps & security engineering

Multiplatform docker images for cfn-lint (and a v1.52 schema fix)

Automatically updated docker image for cfn-lint