# Cedar Joins CNCF as a Sandbox Project

DevFeed: [Cedar Joins CNCF as a Sandbox Project](<https://devfeed.tech/articles/cedar-joins-cncf-as-a-sandbox-project-4750.md>)

Original publisher: [Read original article](<https://aws.amazon.com/blogs/opensource/cedar-joins-cncf-as-a-sandbox-project/>)

Author: Lara Langdon

Published: 2025-12-15T18:21:10Z

Content type: article

Language: en

Sources: [AWS Open Source Blog](<https://devfeed.tech/sources/aws-open-source-blog.md>)

Topics: [Access Control](<https://devfeed.tech/topics/access-control.md>), [Open Source](<https://devfeed.tech/topics/open-source.md>), [Authorization](<https://devfeed.tech/topics/authorization.md>), [Cloud Native Ecosystem](<https://devfeed.tech/topics/cloud-native-ecosystem.md>), [SDKs](<https://devfeed.tech/topics/sdks.md>), [Automated reasoning](<https://devfeed.tech/topics/automated-reasoning.md>), [Lean](<https://devfeed.tech/topics/lean.md>), [Rust](<https://devfeed.tech/topics/rust.md>), [Testing](<https://devfeed.tech/topics/testing.md>)

Tags: [authorization](<https://devfeed.tech/tags/authorization.md>), [automated-reasoning](<https://devfeed.tech/tags/automated-reasoning.md>), [cloud-native](<https://devfeed.tech/tags/cloud-native.md>), [cncf](<https://devfeed.tech/tags/cncf.md>), [open-source](<https://devfeed.tech/tags/open-source.md>), [rust](<https://devfeed.tech/tags/rust.md>), [sdk](<https://devfeed.tech/tags/sdk.md>), [security-identity-compliance](<https://devfeed.tech/tags/security-identity-compliance.md>), [testing](<https://devfeed.tech/tags/testing.md>), [verification](<https://devfeed.tech/tags/verification.md>)

## AI overview

Cedar, an open source authorization policy language and SDK, has joined the Cloud Native Computing Foundation as a Sandbox project. The article explains Cedar's purpose-built approach to fine-grained access control, its support for RBAC, ABAC, and ReBAC, and its focus on performance, analyzability, and safety through formal verification and differential testing. It also describes adoption by organizations including Cloudflare, MongoDB, StrongDM, Cloudinary, and AWS services.

## Source excerpt

Cedar, an open source authorization policy language and SDK, has joined the Cloud Native Computing Foundation (CNCF) as a Sandbox project. CNCF provides a neutral home for early stage and developing open source projects. Cedar fulfills the need for a fast, safe, and analyzable authorization policy language in cloud-native environments by allowing developers to define, [...]