Your Images are Out of Date (probably) - The Silent Rebuilds problem
From DevOps and Docker Talk: Cloud Native Interviews and Tooling by Bret Fisher
March 4, 2026 · 39 min · Episode 191
About this episode
This episode discusses the issue of Silent Rebuilds in container base images and the importance of automating updates to prevent vulnerabilities.
Container base images (like Official Docker Hub images) are often updated without new tag versions. I call this Silent Rebuilds. There's no way to know this happens without image digest-checking automation like Dependabot and Renovate with specific settings. Failure to keep up-to-date is a prime source of vulnerabilities that can lead to serious security breaches. Automate the updates! Check out the video podcast version here: https://youtu.be/z_ahbsSc4Fo 🙌 The Agentic DevOps Guild has launched! It's a training + community + mentorship program for engineers wanting to learn the latest CI/CD automation and dive into Agentic DevOps. Meetups are happening now, with new course videos dropping every few weeks. Join the Guild and become your team's leader in AI for infrastructure automation https://www.bretfisher.com/theguild 🍾 ★Show Links★ Course waitlist: GitHub Actions Pro https://www.bretfisher.com/blog/silent-rebuilds https://github.com/BretFisher/silent-rebuilds https://www.bretfisher.com/chainguard-event Creators & Guests Cristi Cotovan - Editor Bret Fisher - Host Beth Fisher - Producer Nirmal Mehta - Host You can also support this podcast by subscribing to my YouTube…
People in this episode
Hosts: Bret Fisher, Nirmal Mehta
Topics covered
- Containerization
- Security
- DevOps
- Automation
- Vulnerabilities
Keywords
- Silent Rebuilds
- image digest-checking
- Dependabot
- Renovate
- security breaches
- CI/CD automation
- Agentic DevOps
- training
- mentorship
- course videos
Mentioned in this episode
Products: Docker Hub, Dependabot, Renovate, Agentic DevOps
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