cfn-lint-ax

Additional rules for cfn-lint.

Requires cfn-lint >= 1.54.0, the release that removed the SAM transform. AWS::Serverless::* resources are no longer expanded into the resources CloudFormation deploys them as, so the rules read the SAM resources directly. See docs/sam-transform-removal.md.

Installation

python -m pip install cfn-lint cfn-lint-ax

Usage

python -m cfnlint template.yaml -a cfn_lint_ax.rules

Run Tests

uv run pytest

User Rules (E9XXX)

Basic Template Errors (E90XX)

Functions (E91XX)

E9101 UnresolvedObject

Parameters (E92XX)

Resources (E93XX)

I9301 EcsServiceFargatePlatformVersionNotOutdated
I9302 EcrRepositoryAutocleanupTag
I9303 CostAllocationTags
I9304 CostAllocationTagProject
I9305 EcsServicePropagateTags
I9306 ServerlessPropagateTags
W9301 S3BucketPublicAccess
W9302 S3BucketEncryption
W9303 CloudfrontDistributionLogging
W9304 CloudfrontDistributionComment
W9305 CertificateManagerCertificateNameTag
W9306 CodeBuildProjectCloudWatchLogs
W9307 CloudfrontDistributionResponseHeadersPolicy
W9308 CloudfrontResponseHeaderConfigLongHstsMaxAge
W9309 EcsServiceDeploymentConfiguration
W9310 CodeBuildProjectImage
W9311 SqsQueueEncryption

Metadata (E94XX)

E9401 MetadataAxChangesetAutoApprove

Outputs (E96XX)

Mappings (E97XX)

Conditions (E98XX)

Metadata

Release files for cfn-lint-ax 1.4.0

For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.

Source distribution (sdist)

Source distribution for cfn-lint-ax 1.4.0
File	Size	Uploaded
cfn_lint_ax-1.4.0.tar.gz	28.2 kB	Aug 25, 2026	Details

Built distribution (wheel)

Table of built distributions (wheels) for cfn-lint-ax 1.4.0
File	Interpreter	ABI	Platform	Reset
cfn_lint_ax-1.4.0-py3-none-any.whl 31.3 kB Aug 25, 2026	Python 3	none	any	Details

Total release size: 59.5 kB

Release files / cfn_lint_ax-1.4.0.tar.gz

Download URL	cfn_lint_ax-1.4.0.tar.gz
Size	28.2 kB
Tags	Source
SHA-256 checksum How to use checksums	`6e670ca7fe428075efaf929ce137704729b5b666c26f4d81e7aecfb854f3d995`
BLAKE2b-256 checksum How to use checksums	`72590a3b66b7124b8c2b094076999cdabcf6318369ec1e039fd3932b06199d4a`
Upload date	Aug 25, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	No
Uploaded via	`twine/7.0.0 CPython/3.10.21`

Release files / cfn_lint_ax-1.4.0-py3-none-any.whl

Download URL	cfn_lint_ax-1.4.0-py3-none-any.whl
Size	31.3 kB
Tags	Python 3
SHA-256 checksum How to use checksums	`62a6ddff3481f6e75d26072cdd5908afa9e45c651bf3c24886fda83b0c047dde`
BLAKE2b-256 checksum How to use checksums	`f5c2933b4cc2ab0b5ecbf17ec894c226a129681b9d878ac6505d33fa43b85977`
Upload date	Aug 25, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	No
Uploaded via	`twine/7.0.0 CPython/3.10.21`