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Apereo CAS

Single sign-on and identity provider server written in Java, supporting the CAS, SAML, OpenID Connect and OAuth 2.0 protocols.

Apereo CAS is the Java server of the CAS project, which handles sign-in for web applications. It is built on the Spring Framework and Spring Boot and speaks the CAS, SAML, OpenID Connect, OAuth 2.0 and WS-Federation protocols, and applications connect to it through the protocols they use. The WAR overlay guide describes a Gradle project that builds a cas.war file for a servlet container such as Apache Tomcat, and the Docker guide offers images that are mostly meant as quickstarts and demos, plus a Helm chart for Kubernetes. The Apereo Foundation maintains the project.

Identity

Status
Active
Maintainer
The Apereo Foundation4
Maintained by
Foundation
First release
200512

Rendering and deploy

Runs as
Always on3
Install with
source-build78

Releases

Current major version
811
Last release
2026-10-2411

Adoption

GitHub stars
11,3922
Contributors
3342

Why these figures do not compare

Sources

  1. 2026-10-31: links, Categories, Multilingual
    apereo.github.io/cas/8.0.x/index.html
  2. 2026-10-31: links, Written in, License, License model, GitHub stars, Contributors
    github.com/apereo/cas
  3. 2026-10-31: links, Runs as
    apereo.github.io/cas/8.0.x/planning/Getting-Started.html
  4. 2026-10-31: Maintainer
    github.com/apereo/cas/blob/master/NOTICE
  5. 2026-10-31: Runtime
    apereo.github.io/cas/8.0.x/planning/Installation-Requirements.html
  6. 2026-10-31: Minimum runtime
    github.com/apereo/cas/blob/v8.0.3/gradle.properties
  7. 2026-10-31: Install with
    apereo.github.io/cas/8.0.x/installation/WAR-Overlay-Installation.html
  8. 2026-10-31: Install with
    apereo.github.io/cas/8.0.x/installation/Docker-Installation.html
  9. 2026-10-31: Built on
    apereo.github.io/cas/8.0.x/planning/Architecture.html
  10. 2026-10-31: Built on
    github.com/apereo/cas/blob/master/README.md
  11. 2026-10-31: Current major version, Last release
    github.com/apereo/cas/releases/tag/v8.0.3
  12. 2026-10-31: First release
    api.github.com/repos/apereo/cas/commits/25042ebd9f1bb54d00384717458c407c96f04071

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