4 repositories · 16.2k stars

Best open-source Cloudflare Security projects

We track 4 open-source Cloudflare Security projects with 16.2k combined GitHub stars. Most are written in Go and TypeScript. The most popular is CFSSL (9.5k★), and 2 projects have shipped code in the last 90 days.

PKI 1
Password Manager 1
Reconnaissance 1
Email 1

PKI1

CFSSL
Hot
cloudflare/cfssl
CFSSL is Cloudflare's PKI/TLS swiss army knife. It's both a command line tool and an HTTP API server for signing, verifying, and bundling TLS certificates.
sslpkicertificates
Go9.5k1.2kOct 2026

Password Manager1

NodeWarden
Hot
shuaiplus/nodewarden
A Bitwarden-compatible password manager server on Cloudflare Workers, D1 and R2 that works with the official Bitwarden apps.
password-managerbitwardenself-hosted
TypeScript3.9k4.4kOct 2026

Reconnaissance1

CF-Hero
musana/CF-Hero
CF-Hero is a reconnaissance tool that uses multiple data sources to discover the origin IP addresses of Cloudflare-protected web applications.
reconnaissanceip-discoveryosint
Go2.6k253Jun 2026

Email1

DMARC Email Worker
cloudflare/dmarc-email-worker
DMARC reports processor using Cloudflare Workers and Email Workers for automated email security monitoring and analytics.
workersdmarcemail-security
TypeScript16937Apr 2026

Compare Security projects

Comparison of Cloudflare Security projects
#	Project	Stars	Language	Status	License
1	CFSSLcloudflare/cfssl	9.5k	Go	Active	BSD 2-Clause "Simplified" License
2	NodeWardenshuaiplus/nodewarden	3.9k	TypeScript	Active	Other
3	CF-Heromusana/CF-Hero	2.6k	Go	Maintained	—
4	DMARC Email Workercloudflare/dmarc-email-worker	169	TypeScript	Maintained	MIT License