OWASP Top 10 Kubernetes Security Risks Explained: Why Credentials Deserve a Closer Look

Kubernetes is widely used in production, but its complex security model creates risks across workloads, identities, infrastructure, and connected cloud services, as outlined in the OWASP Kubernetes Top 10. The discussion emphasizes K03, Secrets Management Failures, because credentials exposed in code repositories, container images, ConfigMaps, environment variables, logs, or through excessive Kubernetes Secret permissions can enable attackers to expand access far beyond an initial cluster. GitGuardian investigations cited in the text found 44 active Kubernetes clusters reachable through leaked credentials, with 30% exposed for more than two years, while the GhostAction supply-chain campaign targeted thousands of secrets in hundreds of repositories used by automation systems. A separate public repository leak involving CISA-related infrastructure reportedly exposed passwords, cloud tokens, certificates, Kubernetes manifests, and deployment configurations, illustrating how source control can reveal both credentials and valuable infrastructure context. Recommended defenses include least-privilege RBAC, network segmentation, encryption of stored secrets, credential discovery across developer devices, repositories, CI/CD pipelines, and images, along with prompt validation, rotation, and revocation of exposed credentials. The text also advocates workload identity federation and short-lived tokens to reduce standing credentials, and presents GitGuardian tools as options for detecting, prioritizing, remediating, and preventing credential leaks throughout the software delivery lifecycle.

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