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KubeLinter
What it is
KubeLinter is free, open-source software that statically analyzes Kubernetes YAML files, Helm charts, and Kustomize manifests for production-readiness and security practices. Default checks include running containers as non-root, limiting privileges, and keeping sensitive information in secrets. Teams can enable or disable checks and create custom checks for organizational policies. Failed checks produce remediation recommendations and a non-zero exit code, supporting automated workflows. The tool can emit several formats in one run, including SARIF and JSON. Installation documentation covers Go, release binaries, Homebrew or LinuxBrew, nix-shell, and Docker. Container images are signed with cosign, with a public verification key supplied; the project notes that keyless signatures are not production ready. KubeLinter uses the Apache License 2.0, supports Kubernetes analysis, and has no paid tiers listed. The README identifies StackRox as creator and Red Hat as its current power.
For and against
For
- Free Apache License 2.0 software
- Checks Kubernetes, Helm, and Kustomize files
- Custom organizational policy checks
- SARIF and JSON output
- Non-zero exit codes support automation
Against
- Commands and configuration formats may change
- Keyless cosign verification is not production ready
- No Terraform or CloudFormation analysis listed
The verdict
KubeLinter provides policy-oriented static checks for Kubernetes manifests with automation-friendly output and exit codes. Its documented compatibility caveat means teams should account for possible command or configuration changes.
Who it suits
It suits developers and platform teams checking Kubernetes configuration against security and readiness policies. Custom checks help organizations encode their own requirements.
Plans and prices
KubeLinter
Apache License 2.0 · no paid tiers listed
Read 4 Oct 2026 · github.com
On the record
- Community support
- The project invites users to join its Slack workspace to engage with maintainers and other users.github.com · read 4 Oct 2026
- Compatibility caveat
- The README warns that command usage, flags, and configuration file formats may change in the future.github.com · read 4 Oct 2026
- Custom checks
- Users can enable or disable checks and create custom checks to match organizational policies.github.com · read 4 Oct 2026
- Default checks
- Default checks cover practices such as running containers as non-root, enforcing least privilege, and storing sensitive information only in secrets.github.com · read 4 Oct 2026
- Install options
- The project documents installation through Go, release binaries, Homebrew or LinuxBrew, nix-shell, and Docker.github.com · read 4 Oct 2026
- Keyless verification
- The README says keyless cosign signatures are not production ready.github.com · read 4 Oct 2026
- Latest release
- The latest release page opened for this research identifies version v0.8.3.github.com · read 4 Oct 2026
- License
- KubeLinter is licensed under the Apache License 2.0.github.com · read 4 Oct 2026
- Lint feedback
- When a check fails, KubeLinter reports remediation recommendations and returns a non-zero exit code.github.com · read 4 Oct 2026
- Maker
- The README says KubeLinter was created by StackRox and is now powered by Red Hat.github.com · read 4 Oct 2026
- Output formats
- KubeLinter can generate multiple output formats in one run, including SARIF and JSON.github.com · read 4 Oct 2026
- Purpose
- KubeLinter statically analyzes Kubernetes YAML files, Helm charts, and Kustomize manifests against best practices for production readiness and security.github.com · read 4 Oct 2026
- Signing
- KubeLinter container images are signed with cosign, and the project provides a public key for verification.github.com · read 4 Oct 2026
- Vulnerability reporting
- The security policy directs confidential vulnerability reports to Red Hat's Product Security team.github.com · read 4 Oct 2026
