What is Yellow Team?

A Yellow Team represents the builders and developers in an organization, focusing on secure software development, architecture, and integrating security into the development lifecycle.

What is a Yellow Team?

A Yellow Team represents the software builders and developers within an organization's security ecosystem. In the extended team color model, yellow teams focus on building secure systems through secure coding practices, security architecture design, and threat-aware development. They complement red teams (attackers), blue teams (defenders), and purple teams (collaborative attack-defense) by addressing security at the source during software creation rather than post-deployment.

How does a Yellow Team fit into security team models?

In the extended color model, yellow teams (builders) join red teams (attackers), blue teams (defenders), and purple teams (collaboration). Green teams represent automation and tooling. Orange teams combine red and yellow for security-aware development education. The yellow team's unique contribution is embedding security into the development lifecycle, ensuring applications are built securely from design through deployment rather than relying solely on post-deployment defensive measures.

What are Yellow Team responsibilities?

Yellow team responsibilities include implementing secure coding standards, conducting threat modeling during design phases, performing code security reviews, integrating security testing into CI/CD pipelines, managing software dependencies and supply chain security, building security features like authentication and encryption correctly, responding to vulnerability findings from penetration tests, and maintaining secure development documentation and training materials for engineering teams.

How does a Yellow Team interact with Red and Blue Teams?

Yellow teams receive vulnerability findings from red team assessments and blue team incident investigations, then remediate identified weaknesses at the code level. They provide blue teams with application security telemetry and logging requirements. Orange team exercises combine red and yellow team collaboration where attackers teach builders about real exploitation techniques. This interaction creates feedback loops that continuously improve application security.

What skills do Yellow Team members need?

Yellow team members need secure coding expertise in their development languages, understanding of common vulnerability classes (OWASP Top 10), threat modeling methodology knowledge, familiarity with security testing tools and CI/CD integration, cryptographic implementation skills, secure architecture design patterns, API security best practices, dependency management and supply chain security awareness, and incident response collaboration skills for vulnerability remediation.

How do you build an effective Yellow Team?

Build an effective yellow team by establishing security champions within development teams, providing ongoing secure coding training, integrating SAST and DAST tools into development workflows, conducting regular threat modeling sessions for new features, creating secure coding guidelines specific to your technology stack, implementing peer code review processes with security focus, measuring security metrics like vulnerability density, and fostering collaboration with red and blue teams.

What is the Orange Team concept?

The orange team concept combines red team (offensive) and yellow team (builder) activities where offensive security experts train and collaborate directly with developers. Orange team exercises demonstrate how real-world attacks exploit coding vulnerabilities, making abstract security guidance concrete. Developers learn to think like attackers, improving their ability to identify and prevent security flaws during development rather than discovering them through post-deployment testing.

How does the Yellow Team contribute to DevSecOps?

Yellow teams are central to DevSecOps by owning security responsibility within development processes. They implement automated security gates in CI/CD pipelines, maintain security unit tests alongside functional tests, conduct design-phase threat analysis, manage dependency vulnerability scanning, create secure coding templates and libraries, and ensure security requirements are tracked alongside feature development. Yellow team maturity directly correlates with DevSecOps program effectiveness.