What is the main benefit of using OPA image security templates?

They prevent untrusted or vulnerable containers from running in your Kubernetes cluster by enforcing strict source, integrity, and provenance rules via Policy as Code.

Can I use this for signature verification?

Absolutely. The skill provides patterns for validating that images have been cryptographically signed by an approved authority in your KMS or CI/CD pipeline.

Why should I use image digests instead of tags like 'latest'?

Image tags are mutable and can be overwritten by attackers; cryptographic digests (SHA256) are immutable, ensuring the code you tested is exactly what runs in production.

Does this skill help with vulnerability management?

Yes, it includes templates to reject images that have scan results containing high or critical vulnerabilities, stopping insecure code before it deploys.

OPA Image Security Templates

Name: OPA Image Security Templates
Author: adaptive-enforcement-lab

byadaptive-enforcement-lab

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Security & Testing

Secures Kubernetes clusters by enforcing OPA policies for container registry allowlisting, image digests, and cryptographic signature verification.

This skill provides a suite of Open Policy Agent (OPA) templates designed to harden Kubernetes environments against supply chain attacks and unauthorized deployments. It enables developers to automatically enforce critical security standards, such as restricting image pulls to trusted private registries, requiring immutable image digests to prevent tag mutation, and validating build provenance through KMS-backed signatures. By integrating these enforcement patterns into the development workflow, teams can ensure that only verified, vulnerability-free containers are permitted to run in production clusters.

Key Features

01Cryptographic signature verification for secure build provenance

02Automated rejection of containers with known high/critical CVEs

03Mandatory image digest enforcement to prevent tag mutation attacks

040 GitHub stars

05Registry allowlisting to block untrusted public image sources

06Pre-configured Rego policy templates for rapid Kubernetes implementation

Use Cases

01Automating security compliance by blocking images with unresolved vulnerabilities

02Preventing supply chain attacks by restricting deployments to internal registries

03Hardening production environments by requiring immutable @sha256 references

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add adaptive-enforcement-lab/claude-skills opa-image-security-templates

For use in Claude.ai and ChatGPT

Download Skill