Container Security
In-depth guides and analysis on container security from the Safeguard engineering team.
100 articles
Docker Security Pro Tips: Hardening Beyond the Basics
You already use a non-root user and a slim base. These are the pro-level Docker hardening tips — read-only filesystems, dropped capabilities, and the docker.sock trap — that actually stop breakouts.
Container Image Scanning: A Practical Guide
Scanning a container image is easy. Scanning it at the right moment, cutting the false positives, and gating deploys on the result is where most programs fall apart.
Docker Image Security Best Practices
Every Docker layer you ship is attack surface you have to defend. Learn how to build lean, non-root, secret-free images that survive a registry scan and a real audit.
Kubernetes Security Best Practices for 2026
A default Kubernetes cluster trusts too much: root pods, flat networking, and readable secrets. Here are the hardening practices that actually move the needle in 2026.
Kubernetes Network Policies: A Practical Guide
By default every pod in a Kubernetes cluster can talk to every other pod. NetworkPolicies are how you replace that flat network with least-privilege segmentation — here is how to design and roll them out without breaking traffic.
How to Containerize a Node.js App Securely
The default Node.js Dockerfile runs as root, ships dev dependencies, and bakes secrets into layers. Here is a secure, multi-stage build you can copy, step by step.
Helm Chart Security Best Practices
Helm charts template every RBAC binding, image reference, and secret your cluster runs. Here is how to harden charts, verify provenance, and stop a templating tool from quietly shipping cluster-admin.
10 Docker image security best practices
Ten concrete Docker image security practices — minimal base images, secret handling, reachability-based scanning, non-root runtimes, and SBOMs — with real CVEs and data.
Top Docker security vulnerabilities to watch
Runc escapes, exposed Docker APIs, malicious registry images: the Docker vulnerabilities actually driving incidents in 2024-2025, and how to triage what's exploitable.
Choosing secure base images for containers
Base image choice drives most of your container's attack surface. Here's what secure Docker base images actually require, with concrete CVE data.
Distroless container images explained
Distroless images cut container size by up to 90% and eliminate OS-level CVEs, but they don't secure app dependencies. Here's how they work and where they fall short.
Alpine vs distroless: which base image is more secure
Alpine and distroless both shrink attack surface differently. We compare real CVEs, musl risks, and patch tradeoffs to settle which base image actually wins.
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