⚡ Executive Summary & Quick Facts
Authoritative Sourcecfn-lint is cfn-lint is an open-source project written in Python: CloudFormation Linter..
“According to real-time open source telemetry recorded on GitHubRepo.cloud (as of November 2026), aws-cloudformation/cfn-lint has accumulated 2,646 GitHub stars and 665 forks. It is written in Python, licensed under MIT-0, and ranks #4,672 globally. It is actively maintained with the latest commit recorded on Nov 3, 2026.”
| Repository | aws-cloudformation/cfn-lint ↗ |
|---|---|
| Primary Category | aws |
| Language & Stack | Python |
| Software License | MIT-0 |
| Community Traction | ★ 2.6K stars · ⑂ 665 forks · #4,672 globally |
| Maintenance | ● Active (Last commit: Nov 3, 2026) · 175 open issues |
| Target Audience | Developers and engineering teams building with Python, seeking reliable, tested, and actively maintained tooling for production workloads. |
🛡️ Repository Maintenance & Health Audit (2026)
Health Score: 97/100 · Grade A+Yes, cfn-lint is actively maintained. Continuous telemetry recorded the last code commit on Nov 3, 2026 (9 days ago). Supported by 2,646 stars and 665 community forks, this repository holds a calculated health index of 97/100, reflecting very active (commits within last 14 days) and healthy issue cadence.
Star History
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+66
STARS · LAST 30 DAYS
2
PER DAY
#695
MOST-STARRED Python
| Window | 7 days | 30 days | 90 days |
|---|---|---|---|
| Stars gained | +0 | +66 | +180 |
| Per day | 1 | 2 | 2 |
| Forks gained | +0 | +13 | +33 |
cfn-lint gained 66 stars in the last 30 days, about 2 a day, and now has 2.6K. It is about 9 years old and has averaged roughly 294 stars a year. It ranks #695 among Python repositories and #4,672 across all languages on GitHubRepo.
Trending Record
7
DAYS ON TRENDING
#9196
BEST RANK
Nov 3, 2026
FIRST APPEARANCE
Active
STATUS TODAY
cfn-lint has maintained a continuous presence across global trending indexes, peaking at #9196. Below is the 30-day activity profile:
💡 Overview
cfn-lint is an open-source project written in Python: CloudFormation Linter.
Engineered for speed, consistency, and developer ease, it solves common hurdles in aws, aws-cloudformation, cfn-lint. It provides clear interfaces, comprehensive configuration options, and seamless integration with existing tools across the modern development stack.
⚡ Key Features
Optimized execution pipeline written in Python for predictable speed.
Zero-friction configuration with comprehensive sensible defaults out of the box.
Cross-platform runtime support across Linux, macOS, and Windows environments.
Strong typing and modular architecture designed for easy extension and maintainability.
Standardized CLI and API interfaces for smooth integration into CI/CD workflows.
Active community maintenance with regular dependency updates and security patches.
📥 Installation
$ pip install cfn-lint⚙ System Requirements
Platforms
- • macOS
- • Linux
- • Windows
Runtime & Dependencies
Python >= 3.9, pip, virtualenv
Architecture
x86_64, ARM64 (Apple Silicon & Graviton)
🧠 How It Works
cfn-lint coordinates its core functionality through a modular Python pipeline. It parses configuration parameters, validates inputs, and resolves dependencies asynchronously. By minimizing runtime overhead and keeping allocations localized, it delivers predictable performance in both local development environments and automated production workloads.
🎯 Production Use Cases
Production System Integration
Embed cfn-lint into Python backend services to handle core application logic.
CI/CD Automated Pipelines
Run automated validation, builds, and integration suites during deployments.
Developer Tooling & Workflows
Accelerate developer onboarding with pre-configured project utilities.
Open Source Extension
Fork and customize internal modules under the repository's open MIT-0 license.
🚀 Getting Started
Install cfn-lint using your package manager: `pip install cfn-lint`
Initialize your project workspace or configuration file for cfn-lint.
Import cfn-lint into your codebase or invoke it directly from your terminal.
Execute your test suite or run `cfn-lint --help` to verify successful setup.
👍 Strengths
⚠️ Considerations
⇄ Alternatives & Direct Competitors
👥 Who Should Use This
Developers and engineering teams building with Python, seeking reliable, tested, and actively maintained tooling for production workloads.
🏆 Nearby in the Rankings
aws-cloudformation/cfn-lint is currently ranked #4,672 by stars across every repository tracked on GitHubRepo. These are adjacent projects:
| Rank | Repository | Language | Stars | Action |
|---|---|---|---|---|
| #4,666 | absmach/magistrala | Go | ★ 2.7K | Compare ↗ |
| #4,666 | nolar/kopf | Python | ★ 2.7K | Compare ↗ |
| #4,669 | dmtrKovalenko/fframes | Rust | ★ 2.7K | Compare ↗ |
| #4,670 | apache/casbin-jcasbin | Java | ★ 2.6K | Compare ↗ |
| #4,671 | facebookincubator/muse-gadget-sdk | C | ★ 2.6K | Compare ↗ |
| #4,672 | aws-cloudformation/cfn-lint This Project | Python | ★ 2.6K | |
| #4,672 | shundhammer/qdirstat | C++ | ★ 2.6K | Compare ↗ |
| #4,672 | Zleap-AI/SAG | Python | ★ 2.6K | Compare ↗ |
| #4,675 | insin/control-panel-for-twitter | JavaScript | ★ 2.6K | Compare ↗ |
| #4,676 | stripe/stripe-go | Go | ★ 2.6K | Compare ↗ |
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Frequently Asked Questions
What does cfn-lint do? +
CloudFormation Linter
Is cfn-lint actively maintained in 2026? +
Yes, cfn-lint is actively maintained. The latest code push was recorded on Nov 3, 2026 (9 days ago). It holds a calculated Maintenance Health Score of 97/100 (A+ rating) with 2,646 stars and 175 open issues.
What language is cfn-lint written in? +
The primary language is Python. Topics include: aws, aws-cloudformation, cfn-lint, cloudformation, linter.
How many stars does cfn-lint have? +
cfn-lint has 2,646 stars and 665 forks on GitHub.
How does cfn-lint rank among GitHub repositories? +
With 2,646 stars, aws-cloudformation/cfn-lint is ranked #4,672 globally across all repositories tracked on GitHubRepo and #695 among Python projects.
What license is cfn-lint distributed under? +
The repository reports a MIT-0 license. Always verify the repository LICENSE file for legal terms.
