PyRank
aws-cloudformation

cfn-lint

CloudFormation Linter
PyPI GitHub Verified repo
No known security advisories. The current version has no OSV.dev malware reports and no critical or high-severity vulnerabilities.

cfn-lint has 109.9M monthly downloads and 3K GitHub stars. Version 1.52.1 supports Python <3.15,>=3.10, first published in 2018.

It is actively maintained under a permissive license, last released in Jun 2026.

It is built on top of aws-sam-translator, jsonpatch and networkx. It is used by 20 tracked packages, including aws-sam-cli, taskcat and awslabs-aws-iac-mcp-server.

GitHub topics include cloudformation, aws and aws-cloudformation.

Downloads
Day
3.5M
Week
25.1M
Month
109.9M
Stars
2.6K
Forks
635
Issues
61
Version
1.52.1

Package Insights

What's this?
Score breakdown - each component scores 0-100, weighted by percentage
Maintenance
100
Popularity
75
Adoption
70
Community
85
Provenance
100
How the maintenance status was determined
Last commit
7 days ago
Monthly downloads
109,920,739
• Active
Activity within 30 days
Stable
Activity within 31-180 days
Minimal
Activity within 181-365 days, or no activity data
At Risk
No activity for > 365 days, but > 10,000 monthly downloads
Archived
Repository flagged as archived on GitHub
How the popularity category was determined
Monthly downloads
109,920,739
Stars
2,630
Stars per 1k downloads
0.02
• Industry Standard
> 10,000,000 monthly downloads
Hidden Gem
< 0.5 stars per 1k downloads and > 100,000 monthly downloads
Community Favorite
> 5 stars per 1k downloads
Rising Star
Balanced ratio of stars to downloads
Unknown
Fewer than 1,000 monthly downloads, or no star data
How download momentum is calculated
Week daily avg
3,585,143
Month daily avg
3,664,025
Momentum
-2.2%
((week_daily_avg - month_daily_avg) / month_daily_avg) * 100
Python version support tiers
requires_python
<3.15,>=3.10
Cutting Edge
Minimum supported version is 3.12 or newer
• Modern
Minimum supported version is 3.9, 3.10, or 3.11
Legacy
Supports 3.8 or older (or Python 2)
Unknown
No requires_python specified or unparseable
License categories
License
MIT-0
• Permissive
MIT, Apache, BSD, ISC, Unlicense, CC0, etc.
Copyleft
GPL, LGPL, AGPL, MPL, EPL, etc.
Proprietary
Commercial, all rights reserved, custom EULAs
Unknown
No license specified, or none of the above match
How the release cadence was determined
Last release
7 days ago
Total releases
464
Releases/year
56.4
• Rapid
Last release within 365 days and > 12 releases/year
Regular
Last release within 365 days
Slow
Last release 366-730 days ago
Stalled
Last release > 730 days ago, or no releases
Unknown
No usable release date available
How contributor risk was determined
Contributors
191
Monthly downloads
109,920,739
High Load
≤ 2 contributors and ≥ 50,000 monthly downloads
Moderate Load
< 10 contributors and ≥ 500,000 monthly downloads
Low Load
< 25 contributors and ≥ 5,000,000 monthly downloads, or sole maintainer with ≥ 10,000 monthly downloads
• Balanced
Enough contributors for the package's popularity
Unknown
No contributor data available
Engagement
91
 
Issue Burden
23.2
per 1k stars
Discussions
6.8
per 1k stars
Fork Ratio
30.1%
contrib / forks
Stale Release
No
 
PR Velocity
Quiet
 

Weekly Downloads

GitHub Stars

Not all downloads include detailed metadata. Breakdowns reflect the subset that does.

Downloads by OS

Linux 2.4M
macOS 1.9K
Windows 865

Python Versions

3.10
22.1% 527.0K
3.12
20.9% 498.2K
3.13
20.8% 496.1K
3.11
20.2% 482.6K
3.14
16.1% 383.1K

Top Countries

1. US US
2.4M
2. GB GB
57.7K
3. IN IN
43.9K
4. SG SG
40.5K
5. SE SE
17.4K
6. JP JP
15.3K
7. IE IE
13.0K
8. BR BR
9.0K
9. DE DE
8.7K
10. AU AU
6.6K
GitHub Topics
Tags from the package's GitHub repository describing what it does.

Package Information

License
MIT-0
First Release
April 17, 2018
Last Release
1 week ago
Last Commit
1 week ago
Latest Version
1.52.1
Total Releases
464
Contributors
191
Open PRs
8
Archived
No
Author
Kevin DeJong
Python Versions
3 3.10 3.11 3.12 3.13 3.14
Wheels
py2 py3
Keywords
aws cloudformation lint
Tracking Since
January 6, 2026
Data Updated
July 5, 2026
Data Freshness
Fresh

Links