Deep dives, practical guides, and incident analyses from engineers who build Safeguard. No fluff, no vendor FUD — just what you need to ship secure software.
OCI defines 14 standard org.opencontainers.image.* annotation keys, but labels are unsigned metadata — anyone with build access can forge them.
CVE-2019-5736 let a malicious container overwrite the host runc binary via root access. Here's how multi-stage, non-root builds close that door for Python apps.
CVE-2024-21626 let a leaked file descriptor turn runc exec into host root. Here's how container escapes actually work — and the layers that stop them.
Docker's default seccomp profile blocks roughly 44 of the 300-plus Linux syscalls, yet a 2019 runc escape bypassed every default namespace boundary anyway.
.NET 8 gave containers a built-in non-root user and chiseled images that cut one team's CVE count 92% — most Dockerfiles still don't use either.
The official node image ships a built-in non-root user, but COPY still writes files as root by default — most Node.js Dockerfiles never actually drop privileges.
Log4Shell hid in countless container images for years before scanning caught it. Here's how to scan base layers and gate builds before that happens again.
A stock node:18 image ships at roughly 940MB with 100-200 tracked CVEs; distroless variants land 80% smaller with 0-2. Here's the real tradeoff.
Sysdig found 76% of containers still run as root — one of four Docker image flaws that turn a routine build into a host compromise.
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